Envelops
n. 包络线；信封（envelop的复数）
🗣️ 情景例句
Come in please, and take a seat.
请进。请坐。
After breakfast,I'll get ready go to work.
在早餐以后，我将准备好去工作。
He has been sick for three weeks.
他已经病了几周了。