Pentaethylated
五乙基化的
🗣️ 情景例句
I have a question.
我有一个问题。
Yes, I have your eraser, too.
是的，我还拿了你的橡皮。
I saw a beautiful fish in the street market the other day.
前几天，我在街市上见到一条很漂亮的鱼。