| 单词 | 奥尔特云 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔Oort cloud〕A swarm of comets orbiting the sun at a distance of one to two light-years, proposed as a source of comets that pass near the sun.奥尔特云：在离太阳一至二光年距离的彗星云，被认为是在太阳附近经过的彗星的来源地美国传统 |
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