engine for boat

例句：

1. 1. The car has a powerful engine that can reach high speeds.
   这辆车有一个强大的引擎，可以高速行驶。
2. 2.The train's engine is responsible for its smooth operation.
   火车的引擎负责其平稳运行。
3. 3.The new aircraft engine is expected to be more fuel-efficient than the old one.
   新型飞机引擎预计将比旧型更节能。