Thus for every rocket heading to Mars, a subsequent rocket will also need to be launched to refuel each ship.

因此，每一枚飞往火星的火箭，都需要发射一枚后续火箭来为每艘飞船补充燃料。

The rocket headed to the boundary of space, and just as it reached that point, a capsule carrying the crew separated from the rest of the rocket.

火箭飞向太空边界，在即将抵达边界时，搭载乘客的太空舱与火箭其余部分分离。

On October 11th, 2000, NASA marked 100th space shuttle mission and in 2018, a Russian Soyuz rocket headed for the International Space Station failed shortly after liftoff and the two-man crew had to make an emergency landing.

2000 年 10 月 11 日，美国宇航局 (NASA) 迎来了第 100 次航天飞机任务；2018 年，一枚前往国际空间站的俄罗斯联盟号火箭在升空后不久就发生故障，两名宇航员不得不紧急着陆。