?? ???????????????????
????:1??????V:??????
2??????????
3????????
4?????????
5????????????
??“??”???????????????????,????????????(NASA)????????12?????17?????????,?3???????????,NASA????,??2?(SpaceX)??“?????????”???????????????????
??????????,NASA??????2?,?,???????SpaceX???????,??????3????
?,???????????????????,NASA??????????SpaceX?,????
?,????6???????????6???????????????????????????????????,???????????????????“???”?????????????????,???????6???14??,?????,????????8????,NASA???,????????????????????“?????????”??2???????????????(SpaceX)???????????“???????”???????????(?? ??????)
??????:????