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comet

noun
🔊/ˈkɒmɪt/
🔊/ˈkɑːmɪt/
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  1. a mass of ice and dust that moves around the sun and looks like a bright star with a tail彗星；扫帚星
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    Topics Spacec1
    Word Originlate Old English, from Latin cometa, from Greek komētēs ‘long-haired (star)’, from komē ‘hair’; reinforced by Old French comete.

Comet

🔊/ˈkɒmɪt/
🔊/ˈkɑːmɪt/
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  1. the world's first commercial jet plane, operated by BOAC (British Overseas Airways Corporation) from 1952. Comets were almost twice as fast as earlier planes, but three of them crashed in 1953-54 because of problems in the metal from which they were made. They stopped flying until 1958 when an improved type of Comet offered the first jet service across the Atlantic Ocean.