We currently have nuclear propulsion systems.

我们目前拥有核推进系统。

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。

A rocket is simply a structural body that you can launch, it has a propulsion system.

火箭只是一个可以发射的结构体，它有一个推进系统。

Starliner's propulsion system is part of what NASA describes as the spacecraft's " service module."

“星际客机”的推进系统是NASA所称的“服务舱”的一部分。

Thrust is the force that pushes a spacecraft through the air. It is produced by a propulsion system.

推力是推动航天器穿越空气的力。它由推进系统产生。

At the same time, engineers are seeking to find the cause of helium leaks in the spacecraft's propulsion system.

与此同时，工程师们正在寻找航天器推进系统氦气泄漏的原因。

The thermal protection system, all the propulsion systems that were necessary, really it was an incredible marvel of human engineering.

热防护系统，所有推进系统都很有必要，真的是人类工程学上一个奇迹。

Electric propulsion systems are so simple that really there's just nothing that you really need to be that concerned about.

电力推进系统非常简单，没有什么真的需要担心的地方。