Envelops
n. 包络线；信封（envelop的复数）
🗣️ 情景例句
Of course you recognize him.
你当然认得他。
I think it's about time we got going.
我想差不多是该告辞的时候了。
He's not in trouble, I hope!
我希望他没有遇到麻烦！