复数： spacecrafts

Gravity accelerates spacecraft as they fall towards the sun .

当航天器向太阳靠近时，重力使其加速。

The voyager spacecraft would visit all of these .

旅行者号宇宙飞船将探访所有这些天体。

The new strategy seeks to replace this with a virtuous circle , buying more specialised spacecraft on a reliable schedule .

新的战略就是要替换那样的恶性循环，通过可靠的安排来买更多专业的航天飞机。

They can also travel further from their spacecraft because , in an emergency , they can get back faster .

他们能够去往离太空船更远的地方，因为，在紧急情况下，他们能更快速地赶回来。

New spacecraft like the solar dynamics observatory could help answer some of these questions .

像太阳动力观测卫星这样的新航天器也许能够帮助人类解答一些疑问。