P-nitroacetophenone
[化] 对硝基苯乙酮
🗣️ 情景例句
Fish, fish, send me a fish.... I got one!
鱼 鱼 给我一条鱼 ……我钓到了！
What is the total circulation of this newsletter.
这份新闻通讯总发行量多少？
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，