Precontamination
初期污染
🗣️ 情景例句
You have that look in your eye.
你看起来好像有了主意似的。
Which one do you like?
你喜欢哪一个？
Do you see that notice? It says No Camping -- in case you can't read!'
你们看到那个布告牌了吗？上面写着‘禁止野营’－－除非你们不识字！”