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

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)?????????“????”????????????????????????????????????(???? ??)

????:??????