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词汇 free fall
释义

Definition of free fall in English:

free fall

noun
mass noun
  • 1Downward movement under the force of gravity only.

    (物体只受到重力作用时的)自由下落

    the path of a body in free fall

    自由落体的路径。

    Example sentencesExamples
    • Some experienced foreign jumpers displayed hand-in-hand group jumping, wingsuit jumping and somersaults during free fall; all the risky stunts thrilled the audience.
    • One was given the impression of a man in free fall descending like a fallen angel into the unforgiving landscape below.
    • I can't think of any other film which understands that outside a gravity well, all objects are in free fall.
    • Most people at that time believed that the speed of a body in free fall was proportional to the distance it had fallen.
    • Even with his results on free fall he was much more interested in proving geometrical theorems than in their relation to the real world.
    • He deployed the parachute straight away, jolting him out of free fall.
    • Each of the stones whose trajectory Newton illustrated was in free fall toward Earth.
    • Finally, mathematical concepts and procedures quite different from those of medieval natural philosophers were adopted by Galileo in reaching his basic law of free fall of heavy bodies.
    • Benedetti was an important forerunner of Galileo, worked on the free fall of bodies and proposed a theory almost identical to that which Galileo published in De motu in 1590.
    • They are also provided training in military free fall parachuting, forward air control techniques, air traffic control, and other pathfinder related skills.
    • And so is the possibility that profit margins will disappear if, say, a company's customers plan to pay in euros, whose value has dropped faster than an elevator in free fall.
    • For instance, the law of free fall is affirmed to hold only for motion in a vacuum, and Boyle's Law is affirmed to hold only for changes at constant temperature.
    • The contents of the plane are effectively in free-fall, creating weightlessness for all those on-board… and nausea!
    • The total energy output, or luminosity indicated by the spectrum, however, was too bright to be powered by gravity and the free fall of matter alone.
    • In free fall everything is falling at the same rate and is in a weightless state, so the air is of equal density everywhere on board the spacecraft.
    • In all conditions except that of free fall, a live body can be distinguished from an inert structure by the relative disposition of the body parts, its ‘posture’.
    • It was an odd sensation, feeling as though one were sitting still, though simultaneously moving at some unguessable speed that could have been a snail's pace or free fall in a void.
    • That includes parachuting - both static line and free fall, scuba diving, land navigation, vehicle and boat.
    • How long the actual jump lasts: About one minute in free fall and another five minutes in the parachute.
    • One of the most important factors in the snake's midair shift from free fall to glide is a dramatic increase in the width of the animal's body.
    1. 1.1 A rapid decline that cannot be stopped.
      (不可阻止的)迅速下降
      her career seemed about to go into free fall

      她的事业似乎马上就要一落千丈。

      Example sentencesExamples
      • Manufacturing fell gradually, until the decline went into free fall with the recession of 2001.
      • But government intervention won't stop this market if it goes into free fall.
      • With the economy in free fall, those advantages can make all the difference.
      • The disintegration of communist governments throughout Europe and the breakup of the Soviet Union in 1991 caused the Cuban economy to go into free fall for a number of years.
      • As I have asked the House before, how long would it take for the economy of New Zealand to go into free fall if we had foot-and-mouth come into this country?
      • That's why a plan devised at the height of a boom - to cull an oversized surplus - made equally great sense when the economy was in free-fall.
      • I tossed and turned at night, worrying that I would never have the things I wanted (success, love, etc.) and generally feeling like my life was in free fall.
      • They have suffered in image ever since the market free fall of the late 80s/early 90s and suffered financially since the dot-coms that filled the fiscal void also fell off the map.
      • Its stock price in free fall, its market share under attack, its advertising turned to dreck, the greatest marketing machine in the world focused on the most inessential matter imaginable.
      • So while student numbers are increasing, quality is falling, and morale is in free-fall.
      • But concerted buying of the currency will be inevitable should it go into free fall if the US recovery turns out to be less robust than projected.
      • But in the years that followed, his career went into free-fall.
      • The problem is that when the financial plug is pulled, as the players fear might happen, clubs go into free fall.
      • We will undoubtedly recall that just a decade ago, shares did go into free fall, and it did result in a recession of sorts.
      • Let's hope the new major review on the dairy industry finds a solution or at least the means of stopping the free fall.
      • A sluggish economy, a stock market free fall, and a government that can't balance its books is a potentially calamitous combination.
      • I am only too aware of the potential catastrophe if the stock market were allowed to go into free fall.
      • Porsche's sales were in free fall, and losses threatened it with a looming liquidity crisis.
      • In the aftermath of the Games, the Australian dollar has suffered a free-fall, plunging to record lows against the US dollar and most other currencies.
      • At this point anyone taking a dispassionate view of what has been going on since the markets started to go into free fall early 2001 could be forgiven for detecting more than a hint of desperation in the analysis.
      • Now, with print circulation in free fall, publishers have got to serve ads and collect revenue from somewhere.
    2. 1.2 The movement of a spacecraft in space without thrust from the engines.
      (太空航天器在无发动机推力时的)惯性运动,自由下降
      Example sentencesExamples
      • It is not caused by the fact that the shuttle is so far from the Earth; it is produced because the space shuttle is in free fall under the influence of gravity.
      • The aeroplane is steered in such a way that the wings deliver no lift at all, so it is in a state of free fall.
      • Prior to the final touch down, the spacecraft shuts down the propulsion engine and enters into a free fall descent.
      • By the way, a spacecraft orbiting Earth is in free fall as are all objects inside the craft.
      • It is true, as you say, that the clock, like the astronauts, is in free fall and we often call that state ‘microgravity’ or zero gravity.
      • Cassini-Huygens is in free fall towards Saturn, which means that it is accelerating continuously.
      • I must say I was having fearful thoughts for my crew's hearts if we were forced to spend many more months in free fall.
      • The International Space Station is also in free fall toward Earth.
      • Stability during the free fall is a problem, particularly during the high acceleration phases of entry into denser atmosphere.
verb
[no object]
  • Move under the force of gravity only; fall rapidly.

    (物体只受到重力作用时的)自由下落

    I was free-falling and was quickly 1,000 ft below him
    Example sentencesExamples
    • But some of the scenes - like one of an astronaut free-falling from the space station - really brought home the peril of the job.
    • The next second, she was seemingly free-falling through the gray sky, clenching her teeth to avoid screaming as she descended at high speed.
    • Within a week a dozen scientific teams will be aboard it as it thrusts skyward, then free-falls - and in so doing briefly cancels out the effect of gravity.
    • Boulders slid and rolled down the slope, and eventually free-fell onto the talus slopes below.
    • Guests shoot from 0-128 mph in 3.5 seconds along a horizontal track, then 456 ft up a vertical rail, before free-falling towards ground through a 270-degree corkscrew.
    • In 1997, five skydivers on a tourist flight from Auckland jumped from a plane, hoping to free-fall to Antarctica.
    • Sage, unlike Ash, did not enjoy free-falling in the least.
    • In the case of the free-falling body, the two kinds of energy we are concerned with are kinetic energy and potential energy.
    • And it is said some sportsmen, to show their skill in free-falling, open their parachutes as late as possible.
    • Today's generation is picking up on snow boarding, sand surfing, mountain biking, para-gliding, free-falling, base jumping and even the somewhat bizarre extreme ironing.
    • On his 94th birthday, he leapt out of an airplane strapped to a skydiving instructor and free-fell for a mile.
    • But the distress caused by my dull outfit was short-lived as I grew confident that my appearance would not be my main concern when I was free-falling at 180 miles per hour.
    • With the bar held tight to my chest, I free-fell for what seemed to be an eternity, then tension in my hang strap slowly returned and the glider leveled out.
    • After free-falling for more than four and a half minutes, he felt himself slowed by the friction of a gradually thickening atmosphere.
    • I free-fell for about four seconds, then reached back, grabbed my pilot chute and tossed it out.
    • It has been shown that a 100-micron droplet requires a little over 5 seconds to free-fall 5 feet if no evaporation occurs.

Definition of free fall in US English:

free fall

nounˈfrē ˌfôlˈfri ˌfɔl
  • 1Downward movement under the force of gravity only.

    (物体只受到重力作用时的)自由下落

    the path of a body in free fall

    自由落体的路径。

    Example sentencesExamples
    • Some experienced foreign jumpers displayed hand-in-hand group jumping, wingsuit jumping and somersaults during free fall; all the risky stunts thrilled the audience.
    • It was an odd sensation, feeling as though one were sitting still, though simultaneously moving at some unguessable speed that could have been a snail's pace or free fall in a void.
    • They are also provided training in military free fall parachuting, forward air control techniques, air traffic control, and other pathfinder related skills.
    • How long the actual jump lasts: About one minute in free fall and another five minutes in the parachute.
    • Benedetti was an important forerunner of Galileo, worked on the free fall of bodies and proposed a theory almost identical to that which Galileo published in De motu in 1590.
    • Finally, mathematical concepts and procedures quite different from those of medieval natural philosophers were adopted by Galileo in reaching his basic law of free fall of heavy bodies.
    • For instance, the law of free fall is affirmed to hold only for motion in a vacuum, and Boyle's Law is affirmed to hold only for changes at constant temperature.
    • Even with his results on free fall he was much more interested in proving geometrical theorems than in their relation to the real world.
    • One was given the impression of a man in free fall descending like a fallen angel into the unforgiving landscape below.
    • In free fall everything is falling at the same rate and is in a weightless state, so the air is of equal density everywhere on board the spacecraft.
    • That includes parachuting - both static line and free fall, scuba diving, land navigation, vehicle and boat.
    • Most people at that time believed that the speed of a body in free fall was proportional to the distance it had fallen.
    • The total energy output, or luminosity indicated by the spectrum, however, was too bright to be powered by gravity and the free fall of matter alone.
    • And so is the possibility that profit margins will disappear if, say, a company's customers plan to pay in euros, whose value has dropped faster than an elevator in free fall.
    • One of the most important factors in the snake's midair shift from free fall to glide is a dramatic increase in the width of the animal's body.
    • Each of the stones whose trajectory Newton illustrated was in free fall toward Earth.
    • The contents of the plane are effectively in free-fall, creating weightlessness for all those on-board… and nausea!
    • In all conditions except that of free fall, a live body can be distinguished from an inert structure by the relative disposition of the body parts, its ‘posture’.
    • I can't think of any other film which understands that outside a gravity well, all objects are in free fall.
    • He deployed the parachute straight away, jolting him out of free fall.
    1. 1.1 The movement of a spacecraft in space without thrust from the engines.
      (太空航天器在无发动机推力时的)惯性运动,自由下降
      Example sentencesExamples
      • Prior to the final touch down, the spacecraft shuts down the propulsion engine and enters into a free fall descent.
      • The aeroplane is steered in such a way that the wings deliver no lift at all, so it is in a state of free fall.
      • It is true, as you say, that the clock, like the astronauts, is in free fall and we often call that state ‘microgravity’ or zero gravity.
      • Stability during the free fall is a problem, particularly during the high acceleration phases of entry into denser atmosphere.
      • It is not caused by the fact that the shuttle is so far from the Earth; it is produced because the space shuttle is in free fall under the influence of gravity.
      • Cassini-Huygens is in free fall towards Saturn, which means that it is accelerating continuously.
      • The International Space Station is also in free fall toward Earth.
      • By the way, a spacecraft orbiting Earth is in free fall as are all objects inside the craft.
      • I must say I was having fearful thoughts for my crew's hearts if we were forced to spend many more months in free fall.
verbˈfrē ˌfôlˈfri ˌfɔl
[no object]
  • Move under the force of gravity only; fall rapidly.

    (物体只受到重力作用时的)自由下落

    Example sentencesExamples
    • And it is said some sportsmen, to show their skill in free-falling, open their parachutes as late as possible.
    • In 1997, five skydivers on a tourist flight from Auckland jumped from a plane, hoping to free-fall to Antarctica.
    • After free-falling for more than four and a half minutes, he felt himself slowed by the friction of a gradually thickening atmosphere.
    • In the case of the free-falling body, the two kinds of energy we are concerned with are kinetic energy and potential energy.
    • Guests shoot from 0-128 mph in 3.5 seconds along a horizontal track, then 456 ft up a vertical rail, before free-falling towards ground through a 270-degree corkscrew.
    • Boulders slid and rolled down the slope, and eventually free-fell onto the talus slopes below.
    • But the distress caused by my dull outfit was short-lived as I grew confident that my appearance would not be my main concern when I was free-falling at 180 miles per hour.
    • The next second, she was seemingly free-falling through the gray sky, clenching her teeth to avoid screaming as she descended at high speed.
    • It has been shown that a 100-micron droplet requires a little over 5 seconds to free-fall 5 feet if no evaporation occurs.
    • Within a week a dozen scientific teams will be aboard it as it thrusts skyward, then free-falls - and in so doing briefly cancels out the effect of gravity.
    • I free-fell for about four seconds, then reached back, grabbed my pilot chute and tossed it out.
    • Today's generation is picking up on snow boarding, sand surfing, mountain biking, para-gliding, free-falling, base jumping and even the somewhat bizarre extreme ironing.
    • On his 94th birthday, he leapt out of an airplane strapped to a skydiving instructor and free-fell for a mile.
    • With the bar held tight to my chest, I free-fell for what seemed to be an eternity, then tension in my hang strap slowly returned and the glider leveled out.
    • But some of the scenes - like one of an astronaut free-falling from the space station - really brought home the peril of the job.
    • Sage, unlike Ash, did not enjoy free-falling in the least.
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