steam cylinder head

例句：

1. 1. The engine needs to be cleaned regularly to keep the steam from building up inside.
   发动机需要定期清理，以保持蒸汽不积存。
2. 2. Steam is a common way to heat water for cooking.
   蒸汽是一种常见的加热水用于烹饪的方式。
3. 3. The steam from boiling water rises and escapes through a vent pipe.
   沸腾的水产生的蒸汽上升并通过排气管排出。