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词汇 trajectory
释义

Definition of trajectory in English:

trajectory

nounPlural trajectories trəˈdʒɛkt(ə)riˈtradʒɪkt(ə)ritrəˈdʒɛkt(ə)ri
  • 1The path followed by a projectile flying or an object moving under the action of given forces.

    (抛射体的)弹道,轨道,轨迹

    the missile's trajectory was preset
    figurative the rapid upward trajectory of Rich's career
    Example sentencesExamples
    • By 1604 he concluded that projectiles travel along parabolic trajectories.
    • At this time ideas of the trajectory taken by a projectile were still dominated by Aristotle's thinking.
    • Turning toward the central piece I choose a path defined by the trajectory of a rail leading to the center.
    • A ray path is the trajectory that a small packet of seismic energy follows as it travels through the Earth.
    • Then the viewer sees some object describe a trajectory down from the ridge where the camera is.
    • The reaction paths are five-dimensional trajectories that cannot be summarized in a single picture.
    • The ball soared in the azure sky like a missile with a perfect trajectory and rolled a lot upon landing.
    • After all, we still use Newton's law of gravitation to explain and predict the trajectories of projectiles, even though it is no longer believed to be strictly true.
    • Mortars are ballistic weapons that have projectile trajectories undistorted by rocket engine or guidance system.
    • Among lawful sequences of events are Galileo's laws of free fall and the parabolic trajectory of projectiles.
    • I can also move things through the dome by drawing paths through trajectories - it's limitless what you can do.
    • As supply meets demand, a future is created, independent of any plan, but revealed in the trajectories of market forces.
    • A talk on an Air Force rocket-fuel project set their own research trajectories in a new direction.
    • A guided missile corrects its trajectory as it flies, homing in, say, on the heat of a jet plane's exhaust.
    • Since then it has been on an upward trajectory and now stands at over 20 per cent.
    • The dust trails spread out over time as each particle continues to orbit the Sun on a trajectory similar to the path of the parent comet.
    • The trajectory is the path traced by the center of gravity of the projectile from the origin to the level point.
    • A few years ago, my playing partner hit a drive which had the trajectory of an Exocet missile.
    • In this study, these themes describe common decision trajectories.
    • Suborbital paths are the trajectories of choice for ballistic missiles.
    Synonyms
    course, route, path, track, line, orbit, flight, flight path, ambit, direction, bearing, orientation, way, tack, approach
  • 2Geometry
    A curve or surface cutting a family of curves or surfaces at a constant angle.

    〔几何〕常角轨道,轨线

    Example sentencesExamples
    • To investigate this possibility, a simple system can be designed to generate drip trajectories where the degree of chaos can be tuned.
    • So now, you have an intersecting curvature, at every point, say, along a trajectory.
    • Thus, large interception errors were only found for ball trajectories ending relatively far from one's midline.
    • The thick line is a calculated trajectory near a surface and the thin line is a trajectory far from any surface.
    • These three trajectories are known as conic sections, as they are also the curves produced by cutting a cone along different planes.

Origin

Late 17th century: from modern Latin trajectoria (feminine), from Latin traject- 'thrown across', from the verb traicere, from trans- 'across' + jacere 'to throw'.

  • jet from late 16th century:

    The name jet for a hard black semi-precious mineral comes ultimately from the Greek word gagatēs ‘from Gagai’, a town in Asia Minor. When we refer to a jet of water or gas, or a jet aircraft, we are using a quite different word. It comes from a late 16th-century verb meaning ‘to jut out’, from French jeter ‘to throw’, which goes back to the Latin jacere ‘to throw’. Jut (mid 16th century) is a variant of jet in this sense. Jacere is found in a large number of English words including abject (Late Middle English) literally ‘thrown away’; conjecture (Late Middle English) ‘throw together’; deject (Late Middle English) ‘thrown down’; ejaculate (late 16th century) from jaculum ‘dart, something thrown’; eject (Late Middle English) ‘throw out’; inject (late 16th century) ‘throw in’; jetty (Late Middle English) something thrown out into the water; project (Late Middle English) ‘throw forth’; subject (Middle English) ‘thrown under’; trajectory (late 17th century) ‘something thrown across’. Especially if you use budget airlines, air travel today is far from glamorous, but in the 1950s the idea of flying abroad by jet aircraft was new and sophisticated. At the start of that decade people who flew for pleasure came to be known as the jet set.

Rhymes

directory, ex-directory, interjectory, rectory, refectory

Definition of trajectory in US English:

trajectory

nountrəˈdʒɛkt(ə)ritrəˈjekt(ə)rē
  • 1The path followed by a projectile flying or an object moving under the action of given forces.

    (抛射体的)弹道,轨道,轨迹

    the missile's trajectory was preset
    figurative the rapid upward trajectory of Rich's career
    Example sentencesExamples
    • Among lawful sequences of events are Galileo's laws of free fall and the parabolic trajectory of projectiles.
    • The trajectory is the path traced by the center of gravity of the projectile from the origin to the level point.
    • Since then it has been on an upward trajectory and now stands at over 20 per cent.
    • A few years ago, my playing partner hit a drive which had the trajectory of an Exocet missile.
    • The reaction paths are five-dimensional trajectories that cannot be summarized in a single picture.
    • I can also move things through the dome by drawing paths through trajectories - it's limitless what you can do.
    • The ball soared in the azure sky like a missile with a perfect trajectory and rolled a lot upon landing.
    • Turning toward the central piece I choose a path defined by the trajectory of a rail leading to the center.
    • Mortars are ballistic weapons that have projectile trajectories undistorted by rocket engine or guidance system.
    • A guided missile corrects its trajectory as it flies, homing in, say, on the heat of a jet plane's exhaust.
    • A ray path is the trajectory that a small packet of seismic energy follows as it travels through the Earth.
    • Suborbital paths are the trajectories of choice for ballistic missiles.
    • Then the viewer sees some object describe a trajectory down from the ridge where the camera is.
    • After all, we still use Newton's law of gravitation to explain and predict the trajectories of projectiles, even though it is no longer believed to be strictly true.
    • At this time ideas of the trajectory taken by a projectile were still dominated by Aristotle's thinking.
    • The dust trails spread out over time as each particle continues to orbit the Sun on a trajectory similar to the path of the parent comet.
    • As supply meets demand, a future is created, independent of any plan, but revealed in the trajectories of market forces.
    • In this study, these themes describe common decision trajectories.
    • By 1604 he concluded that projectiles travel along parabolic trajectories.
    • A talk on an Air Force rocket-fuel project set their own research trajectories in a new direction.
    Synonyms
    course, route, path, track, line, orbit, flight, flight path, ambit, direction, bearing, orientation, way, tack, approach
  • 2Geometry
    A curve or surface cutting a family of curves or surfaces at a constant angle.

    〔几何〕常角轨道,轨线

    Example sentencesExamples
    • To investigate this possibility, a simple system can be designed to generate drip trajectories where the degree of chaos can be tuned.
    • So now, you have an intersecting curvature, at every point, say, along a trajectory.
    • These three trajectories are known as conic sections, as they are also the curves produced by cutting a cone along different planes.
    • The thick line is a calculated trajectory near a surface and the thin line is a trajectory far from any surface.
    • Thus, large interception errors were only found for ball trajectories ending relatively far from one's midline.

Origin

Late 17th century: from modern Latin trajectoria (feminine), from Latin traject- ‘thrown across’, from the verb traicere, from trans- ‘across’ + jacere ‘to throw’.

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