记忆方法
将“perigee”分解记忆，可以将它分为“peri”和“-gee”。想象“peri”是“period”的缩写，代表周期或周期性的意思。然后，“-gee”可以想象为“circle”的缩写，即圆圈。结合起来，就是“圆圈周期”，即指月亮或地球在椭圆轨道上最接近地球的点，称为“近地点”。
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词族 · perigee
词形变化
中文词源
perigee 近地点
peri-,在附近，-gee,土地，词源同geology,Gaia.
英语词源
- perigee
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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).
权威例句
- 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.
- 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.