Valva
[医] 瓣, 瓣膜
🗣️ 情景例句
Oh, you're right.
哦， 说得对。
It is one thing to speak much and another to speak pertinently.
话讲得多是一回事，讲得恰当是另一回事。
While two detectives were keeping guard at the door, two others opened the parcel.
这时两个侦探把住门口，另外两个侦探打开了包裹。