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单词 θ419
释义
the world > the universe > planet > planetary movement > [noun] > orbit > apsis > perigee (3)
perigeum1594

Astronomy. = perigee, n. 1.

perigee1595

Astronomy and Astronautics. The point in the orbit of the moon, an artificial satellite, etc., at which it is nearest to the earth. Cf. perigeum, n.

perigeum1646

Astronomy. = perigee, n. 2. rare.

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更新时间:2025/2/24 6:54:09