1. The rocket engine ignited as the spacecraft approached the launchpad.
随着航天器接近发射台，火箭发动机点火了。
2. Engineers are testing a new type of ion rocket engine.
工程师们正在测试一种新型离子火箭发动机。
3. The failure of the rocket engine caused the mission to be aborted.
火箭发动机的故障导致任务被迫中止。

A: Did you hear about the successful launch yesterday?
A：你听说昨天的成功发射了吗。

B: Yes, the rocket engine performed perfectly during the ascent.
B：听说了，火箭发动机在上升过程中表现得非常完美。

1) 提供推进动力的核心装置

2) 通过化学反应产生高温高压气体

3) 航天技术中的关键组件

1. 火箭发动机

e.g.
The rocket engine's design is incredibly complex.
火箭发动机的设计极其复杂。

noun phrase

1. A device used to provide thrust for a rocket by expelling propellant at high speed.