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The cometary ejection play a crucial role in formation and evolution of the meteoroid stream.彗星的噴發(fā)速度在流星群的演化過程中起著重要作用....
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meteoroid的音標(biāo)：meteoroid的英式發(fā)音音標(biāo)為：['mi:tj?r??d]meteoroid的美式發(fā)音音標(biāo)為：['mit??r???d]...
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n.流星體...
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micrometeoroid的音標(biāo)：micrometeoroid的英式發(fā)音音標(biāo)為：[ma?kr??'mi:t??r??d]micrometeoroid的美式發(fā)音音標(biāo)為：[?ma?kro?m?t?r?r??d]...
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n.微流星體...