steam engine locomotive

例句：

1. 1. The steam engine is a crucial component in the manufacturing process.
   蒸汽机是生产过程中的关键部件。
2. 2. The engineers are responsible for maintaining and repairing the steam engines.
   工程师负责维护和修理蒸汽机。
3. 3.The steam engine was invented over a century ago and has been used in various industries ever since.
   蒸汽引擎在一百多年前被发明，自那以后就被广泛应用于各个行业。