Micropollution
微量污染
🗣️ 情景例句
Sure. Would you please sign your name on the back, sir, with your passport number?
每问题。先生，请您在支票背后签上名字和护照号码。
I'm going to be sixty-one next Tuesday.
下星期二我将60岁了。
Were you afraid?
你害怕吗？