valvae

例句：

1. 1.The engineer needs to replace the broken valve in the engine.
   工程师需要更换发动机中的损坏阀门。
2. 2.The valve is responsible for controlling the flow of gases through the pipes.
   阀门负责控制气体通过管道的流动。
3. 3.The valve was designed to prevent air from entering the cabin during takeoff.
   阀门设计用来在起飞时防止空气进入客舱。