"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).
实用例句
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.
来自辞典例句
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.
来自辞典例句
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.
来自互联网
4. Due to lunar precession , this time is longer than that if the perigee's position was fixed.
