Precontamination
初期污染
🗣️ 情景例句
Before a long trip I always give my car a safety check.
远行之前，我总是会对车子进行安全检查。
The story Sam told wasn't very funny.
萨姆的故事一点意思也沒有。
Oh, yes, they are.
哦，对，是我的。