The boat started taking water and the engine turned off.

这艘船开始进水，引擎也熄火了。

The engine turned over twice and then stopped.

【turn】引擎发动了两次，然后熄火了。

The full-size hoverbike will be powered by a gasoline engine turning an alternator to provide power for its four electric rotors.

全尺寸翱翔车将由汽油发动机启动的交流发电机为其四个回转轴供能。

Today, you learned about how engines turn thermal energy into work and how to calculate their efficiency.

今天，您了解了电机如何转换能量 热电偶的工作原理以及如何计算它们的有效性。