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Periodic Comet

周期彗星

1、[天]周期彗星

... periodic comet 周期彗星 periodic stream 周期（性）流星雨 periodic term 周期项 ...

2、周期彗星

...period of revolution 公转周期periodic comet 周期彗星periodic error 周期误差 ...

long-periodic comet分成长周期彗星

NON-PERIODIC COMET非周期彗星

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