Clappet
[建] 止回阀
🗣️ 情景例句
Let's have a talk about it in advance.
我们事先商量一下。
I worked at the garage this morning.
我今早在车房工作。
Jim is writing. Lily isn't writing. She's looking at the blackboard.
吉姆在写字。莉莉没在写字。她在看黑板。