Definition of parsec in English:

parsec

noun ˈpɑːsɛkˈpɑrsɛk

A unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 10¹³ kilometres). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc.
秒差距（天文学距离单位，1秒差距约等于3.25光年，即3.08×10¹⁶米；1秒差距对应地球轨道平均半径对向1角秒的距离）
Example sentencesExamples
- But cosmologists are so comfortable with millions and billions that none of them feel the urge to invent a unit much beyond the light-year or the parsec.
- The fact remained that the Rage fleet was within a parsec of Nova.
- For reference, one parsec is around three light years.
- I mean, all the ones that I've looked at so far are within 100 parsecs of 300 light years of the Sun.
- Their absolute magnitude is that of their appearance at 10 parsecs, or 32.6 light-years.

Origin

Early 20th century: blend of parallax and second².

Definition of parsec in US English:

parsec

(also pc)

nounˈpɑrsɛkˈpärsek

A unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 10¹³ kilometers). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc.
秒差距（天文学距离单位，1秒差距约等于3.25光年，即3.08×10¹⁶米；1秒差距对应地球轨道平均半径对向1角秒的距离）
Example sentencesExamples
- The fact remained that the Rage fleet was within a parsec of Nova.
- But cosmologists are so comfortable with millions and billions that none of them feel the urge to invent a unit much beyond the light-year or the parsec.
- For reference, one parsec is around three light years.
- Their absolute magnitude is that of their appearance at 10 parsecs, or 32.6 light-years.
- I mean, all the ones that I've looked at so far are within 100 parsecs of 300 light years of the Sun.

Origin

Early 20th century: blend of parallax and second.

词汇	parsec
释义	Definition of parsec in English: parsec noun ˈpɑːsɛkˈpɑrsɛk A unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 10¹³ kilometres). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc. 秒差距（天文学距离单位，1秒差距约等于3.25光年，即3.08×10¹⁶米；1秒差距对应地球轨道平均半径对向1角秒的距离） Example sentencesExamples But cosmologists are so comfortable with millions and billions that none of them feel the urge to invent a unit much beyond the light-year or the parsec. The fact remained that the Rage fleet was within a parsec of Nova. For reference, one parsec is around three light years. I mean, all the ones that I've looked at so far are within 100 parsecs of 300 light years of the Sun. Their absolute magnitude is that of their appearance at 10 parsecs, or 32.6 light-years. Origin Early 20th century: blend of parallax and second². Definition of parsec in US English: parsec (also pc) nounˈpɑrsɛkˈpärsek A unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 10¹³ kilometers). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc. 秒差距（天文学距离单位，1秒差距约等于3.25光年，即3.08×10¹⁶米；1秒差距对应地球轨道平均半径对向1角秒的距离） Example sentencesExamples The fact remained that the Rage fleet was within a parsec of Nova. But cosmologists are so comfortable with millions and billions that none of them feel the urge to invent a unit much beyond the light-year or the parsec. For reference, one parsec is around three light years. Their absolute magnitude is that of their appearance at 10 parsecs, or 32.6 light-years. I mean, all the ones that I've looked at so far are within 100 parsecs of 300 light years of the Sun. Origin Early 20th century: blend of parallax and second.
随便看	take a furtive/stealthy/surreptitious … take against take against take a gander take a glance at take a good look take a good look at take a grip of take a grip on oneself take a hammering take a hammering take a hand take a hand take a hand in take a header take a heavy toll take a hike take a hike take a hike take a hint take a hold of oneself take a hold on oneself take aim take aim take aim at