以液氢和液氧为燃料的火箭将为宇航员登陆月球提供尤其重要的有利条件。
Using liquid hydrogen and oxygen in rockets will provide major advantages for landing astronauts on the moon.
与此同时，他还命令太空总署在2020年早些时候，研发出新的火箭、太空舱和将宇航员送返月球的着陆舱。
At the same time, he directed NASA to begin development of new rockets, capsules and landers to carry astronauts back to the moon by the early 2020s.
国家航空航天局的两位宇航员将成为首次搭乘外国的航天飞船在外国着陆的美国宇航员。
And the two NASA astronauts would be the first to land in a foreign space craft and in a foreign country.
应用推荐