The engine of the train left the rails at a curve.

火车头在拐弯处脱轨。

《新英汉大辞典》

On the bench beside me a young boy kept glancing up from his copy of Thomas the Tank Engine at the stout, blue-painted train we were waiting to board.

我身边的长椅上坐着一个男孩在看他那本《托马斯和朋友》，等着登上那列牢固的蓝色火车。

youdao

The wind - like the continuous blast of a train whistle, interrupted by the occasional roar of a jet engine - didn't seem to bother her.

风持续地发出像一列火车呼啸而过的声音，还听到喷气式发动机的声音，但这些似乎都没有打扰到她。

youdao

And that's where a majority of the investment goes, both the architecture and the engine and power train.

NPR: Ford's North American Chief Sets Sights on Restructuring

At Coaley Junction in Gloucestershire, the mail train froze and a fire had to be lit underneath it to defrost parts of the engine.

BBC: How different is the winter of 2010 from 1963?