Phthaline
二R甲基苯甲酸
🗣️ 情景例句
But first, I think we should take a moment
不过首先 我想我们应该用一两分钟
You can't eat your cake and have it.
不能既要吃饼，又要把饼保存。
I was very glad when the boys won the relay race.
我非常高兴，男同学在接力赛中获胜。