Clappet (valve)
[化] 止回阀
🧩 词语组成解析
[建] 止回阀
🗣️ 情景例句
How's everything with you?
你一切如何？
Enough is as good as a feast.
知足常乐。
It is a world of red sandy deserts (hence its name----the Red Planet),
红色行星），