Pyridinitrile
病定清
🗣️ 情景例句
Camping out is such great fun.
露营是件非常好玩的事。
We must work out some plan to increase our sales.
我们必须制定一些计划来提高销售成绩。
but they seldom realize that they have brought this on themselves.
殊不知这是他们自找的。