| 单词 | comets |
| 释义 | comet /komˈit/nounA heavenly body with a (usu) elliptical orbit round the sun, having a main nucleus composed of rocky fragments held together with ice and surrounded by a cloud of dust and gas (the coma), which, when the comet nears the sun, may be driven away from the head of the comet to form a luminous tail ORIGIN: Gr komētēs long-haired, from komē hair comˈetary or cometic /-etˈik/ adjective cometogˈraphy noun cometolˈogy noun comˈet-finder noun A telescope of low power used to search for comets |
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