perihelion
听听怎么读
英 [ˌperɪ'hi:lɪən]
美 [ˌperɪ'hilɪrn]
是什么意思
近日点；
变形
复数：perihelia
英英释义
perihelion[ 'peri'hi:liən ]
- n.periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
学习怎么用
双语例句
用作名词(n.)
- A comet is at perihelion when it is closest to the sun.
彗星最接近太阳时，它就是在近日点。 - The anomalistic year is the time between successive transits of the Earth through the perihelion.
近点年是地球连续两次通过近日点之间的时间。
权威例句
Post-perihelion observations of water in comet HalleyMercury's Perihelion from Le Verrier to Einstein by N. T. RoseveareOn the recently determined anomalous perihelion precession of SaturnActivity of comets at large heliocentric distances pre-perihelionPhotochemistry of Pluto's atmosphere and ionosphere near perihelionPhotometric behavior of comet Hale-Bopp (C/1995 O1) before perihelion.The NASA Infrared Telescope Facility Comet Halley Monitoring Program II. Post-Perihelion ResultsExcess open solar magnetic flux from satellite data: 1. Analysis of the third perihelion Ulysses passOptical Observations of Comet Hale-Bopp (C/1995 01) at Large Heliocentric Distances Before PerihelionSolar quadrupole moment and purely relativistic gravitation contributions to Mercury's perihelion advance
