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1·Small satellites shouldn't add to the problem of space debris since they are relatively easy to deorbit.

小卫星相比较而言容易脱轨，但也不应该增加空间碎片问题。

2·To keep people on the ground safe, it's best to deorbit a spacecraft with a strong burn of propellant, to slow it down at the right time.

为确保地面上人的安全，最好的方法是以一个强大的推进器燃烧来使宇宙飞船脱轨，在正确的时间使其慢下来。

3·It's evaluated for every area I and every chunk from a given spacecraft. If the sum total exceeds.0001-i.e., a 1 in 10,000 chance of a single casualty-that craft requires a controlled deorbit.

可以用来评估每一个i区和指定航天器上的每一块垃圾，如果该值超过0.0001，即每一万人中可能会有一个人因此而伤亡，那么就应该对该飞行器的坠落路线进行引导。