Clappet (valve)
[化] 止回阀
🧩 词语组成解析
[建] 止回阀
🗣️ 情景例句
My pleasure, Doctor.
非常荣幸，医生。
Did you go to the school last night?
你昨晚去学校了吗？
The great cities have been built with no regard for us.
大城市的建设毫不关心我们。