不用擔心啦，NASA下一個目的地是火星，正在有條不紊的發展和創新。

來源: 望自遠方於 2014-07-20 13:23:45 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.