Precontamination
初期污染
🗣️ 情景例句
I'm dieting to keep my figure.
我正在节食以保证身材。
Every potter praises his own pot.
老王卖瓜，自卖自夸。
He did very badly on the exam----worse than expected almost the worst in the class.
他考的不好，比期望的还糟。几乎是全班最差的。