Microimpurity
[化] 微量杂质
🗣️ 情景例句
You might want to read up a little on the culture before you get there.
去那儿之前，你应该读一些关于那边文化方面的书。
Of two evils choose the least.
权衡两害，取其轻者。
So one day they took him to a doctor.
于是有一天他们带他去看医生。