弘扬国学 · 传承文化

perigee

英 ['perɪdʒiː] 美 ['pɛrɪdʒi]

解释

n. 近地点

※ 提供单词"perigee"的中文意思、发音示范及音标对照，中英文词源、例句和用法等。

中文词源

perigee 近地点

peri-,在附近，-gee,土地，词源同geology,Gaia.

英文词源

perigee: perigee: see apogee
perigee (n.): "point at which a celestial body is nearest the Earth," 1590s, from Modern Latin perigeum (15c.), from Late Greek peregeion, used by Ptolemy as a noun, properly neuter of adjective perigeios "near the earth," from peri ges, from peri "near" (see peri-) + ges, genitive of ge "earth" (see Gaia).

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例句和用法

1. When perigee and perihelion coincide tidal range is at its greatest.: 当月球与地球到达它们的近地点和近日点的时间恰好重合时,就会引起最大的潮汐.

2. The Moon reaches its absolute perigee once a year.: 月球每年有一次达到它的绝对近地点.

3. The time between two passages at the perigee ( of the Moon ).: 月球连续两次经过近地点所需的时间.

4. Due to lunar precession , this time is longer than that if the perigee's position was fixed.: 由于月岁差的关系, 这个时间比近地点不变的情况下所需之时间长.