Valva
[医] 瓣, 瓣膜
🗣️ 情景例句
I remember.
我记起来啦。
Why are you yelling?
你在嚷什么？
That's what we did in China in the old days, before thermoses were invented, said Wei Hua.
“那是我们中国从前未发明出热水瓶时的做法。”魏华说。