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单词 θ1172
释义
the world > the universe > constellation > comet or meteor > comet > [noun] > head > sector (2)
sector1840

A body or figure having the shape of a sector; hence, a division or part, a unit. Astronomy. (See quot. 1863.)

jet1847

Astronomy. A thin luminous stream of material emitted by and extending away from the nucleus of a comet.

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更新时间:2024/12/23 21:23:57