flywheel
🇺🇸
/ˈflaɪwiːl/
🇬🇧
/ˈflaɪwiːl/
a big wheel in engines or machines that helps them run smoothly and keep the same speed
The engineer checked the flywheel to ensure the engine runs smoothly.
工程师检查飞轮以确保引擎平稳运行。