Prepurification
预纯化(作用)
🗣️ 情景例句
OK. We'll ring you up at 6:00 a.m. tomorrow.
嗯，我们会在明天6点整叫您。
If you're not sure how to do is, ask me.
假如你拿不准怎样做，就来问我好了。
It was a cold spring morning in the city of London in England.
英国伦敦，一个寒冷的春天的早晨。