NASA's Swift satellite views Comet Lulin as it made itclosest approach to Earth in February 2009.

NASA的Swift卫星观察到鹿林彗星，这颗彗星于2009年2月最接近地球。

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NASA's Swift satellite views Comet Lulin as it made itclosest approach to Earth in February 2009.

NASA的Swift卫星观察到鹿林彗星，这颗彗星于2009年2月最接近地球。

youdao