Sootfall
n. (工业区的)煤烟降落(量)
🗣️ 情景例句
Thank you.
谢谢你。
We must stress that these payment terms are very important to us.
我们必须强调这些付款条件对我们很重要。
Open the window and air the room.
打开窗子，给房间通通风。