?? ???????????????????
????:1???????????:???????????
2???????????
3?????150????
4??????
5???????????
??“???????”??????????????????????????????????????????,??????????????(NASA)?12???????17?,??3??????????????????,NASA???,?????????2??????(SpaceX)????????????“??????????”???
???,NASA?????????????????2???,???,?????????????????????????????SpaceX???,?????????????????3???????
????,????,NASA?SpaceX??,?????????
???,???????????6???????????6???,????????????????????“??????”??,?6?????14???????,????,??????8??????????,NASA?????,??“????”???????????????????2??(SpaceX)?“?????????”??(?????????? ????)
?:???????????