We'd have to design new propulsion, navigation, hibernation and life support systems.

我们须设计新的推进，导航，冬眠和生命支持系统。

A firecracker is a rocket because it has a propulsion system.

爆竹是火箭，因为它有一个推进系统。

The submarine's nuclear propulsion system is said to be unaffected.

据说这艘潜艇的核推进系统没有受到影响。

NASA wants more time to examine problems with Starliner's propulsion system.

NASA希望有更多的时间来检查星际客机推进系统的问题。

And hopefully we'll have new kinds of propulsion coming along as well.

希望我们也会有新的推进器出现。

The first electric propulsion engines were actually developed in the 50s and 60s.

最初的电力推进引擎，是在上世纪五六十年代发展起来的。

We currently have nuclear propulsion systems.

我们目前拥有核推进系统。

The technological conscience of this effort is the jet propulsion laboratory's chief engineer, Gentry Lee.

技术方面的成就来自喷气推进实验室的总工程师真特瑞·李。

Why was she not allowed into the engineers' lectures on orbital mechanics and rocket propulsion?

为什么不让她参加工程师们关于轨道力学和火箭推进的讲座？

The Pacific flying squid uses jet propulsion for another purpose: to launch itself right out of the water.

从水中发射出来。