Peroxyacetyl
nitrate [化]硝酸过氧化乙酰
🗣️ 情景例句
Two weeks. I said I could do it in two weeks, and I did it.
两周。我说过我两周就能完成， 现在我做到了。
We can live without our friends, but not without our neighbours.
生活可无友，邻居不能无。
It's hard to say.
难说。