vianvee 发表于 2016-8-13 13:34
我觉得B的it还是代指的是asteroid啊....
你抽一下主句:scientists have identified an asteroid (that is ...
vianvee 发表于 2016-8-13 13:34
我觉得B的it还是代指的是asteroid啊....
你抽一下主句:scientists have identified an asteroid (that is ...
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