“Oort's Cloud”的概念、定义、翻译、参考文献-科学参考

单词	Oort's Cloud
释义	Oort's Cloud [`ȯrts ´klau̇d] ^ASTRONOMY A cloud of comets at distances from 75,000 to 150,000 astronomical units from the sun, which has been proposed as a source of comets that pass near the sun.
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