perigee
英['per?d?i?]
美['p?r?d?i]
- n. 近地點(diǎn)
中文詞源
perigee 近地點(diǎn)
peri-,在附近，-gee,土地，詞源同geology,Gaia.
英文詞源
- 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).
雙語例句
- 1. When perigee and perihelion coincide tidal range is at its greatest.
- 當(dāng)月球與地球到達(dá)它們的近地點(diǎn)和近日點(diǎn)的時(shí)間恰好重合時(shí),就會(huì)引起最大的潮汐.
來自辭典例句
- 2. The Moon reaches its absolute perigee once a year.
- 月球每年有一次達(dá)到它的絕對(duì)近地點(diǎn).
來自辭典例句
- 3. The time between two passages at the perigee ( of the Moon ).
- 月球連續(xù)兩次經(jīng)過近地點(diǎn)所需的時(shí)間.
來自互聯(lián)網(wǎng)
- 4. Due to lunar precession , this time is longer than that if the perigee's position was fixed.
- 由于月歲差的關(guān)系, 這個(gè)時(shí)間比近地點(diǎn)不變的情況下所需之時(shí)間長(zhǎng).
來自互聯(lián)網(wǎng)