????:1???????:???????????

2?????

3???????51??

4???????51??

5?????????

??????“??”???????????????????????????,????(NASA)???????????12??17??,????3???????????????????????????????????????,NASA?,???????2??(SpaceX)???????????“?”??????????????????

????,NASA?2?????????,???????????????????????????????????,???????????????????????????SpaceX?,???3?????????

?????????,???,NASA?????SpaceX?,??????

?????????,???6???6????,??????????????????“???”????,???6???14????,??????????,???????????????8?,NASA????????????,?“??????”??????????2?(SpaceX)???????????????“??”???(???? ??)

???:?????????