Prepollution
初期污染
🗣️ 情景例句
In my country, we get a couple of days off for Easter.
在我国，我们在复活节的时候有好几天的假期。
If you hadn't slipped and fallen,you wouldn't have broken your leg.
如果你没滑倒,你就不会断腿了。
He's only forty-one years old, and he has already been to nearly every country in the world.
他只有41岁，但他却过世界上几乎每一个国家。