comet
comet 英 [ˈkɒmɪt] 美 [ˈkɑmət]
n. [天] 彗星
名词复数:comets
- A comet is a small, icy object that orbits the sun and has a long "tail" of gas. Some comets can be seen from Earth every few years, while others pass by once in a person's lifetime.
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- n. [天] 彗星
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1. As the comet nears the sun, its ice melts, releasing gas and dust that stream away into space.
当彗星靠近太阳时，它的冰层融化，释放的气体和尘埃远远地飘向太空。
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2. He was an early proponent of the theory that life on Earth may have come from Mars in rocks ejected by asteroid and comet impacts.
他是这项理论早期的支持者：地球生命也许来自火星，通过小行星和彗星冲撞而由岩石喷射而出。
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3. These findings have led to claims that a 2.5mile long comet or asteroid smashed into the ice sheet covering what is now Canada and the northern US.
这些发现得出了这样一个结论，即2.5英里长的彗星或者小行星猛烈撞击了现今加拿大和美国北部覆盖的冰层。
- comet (n.) "one of a class of celestial bodies which move about the sun in great, elliptical orbits," c. 1200, from Old French comete (12c., Modern French comète), from Latin cometa, from Greek (aster) kometes, literally "long-haired (star)," from kome "hair of the head" (compare koman "let the hair grow long"), which is of unknown origin. So called from resemblance of a comet's tail to streaming hair.
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