Precontamination
初期污染
🗣️ 情景例句
I can't wake up in the morning without a cigarette or cup of coffee.
早上不抽根雪茄或喝杯咖啡我就醒不了。
I told him to come in while waiting.
我告诉他进来等一下。
I grew a beard during the trip.but I shaved it off when I came home.
我在旅行时留了胡子，但我回到家时就把它刮了。