Anthanthrone
[化] 二苯并[cd,jk]芘-5,10-二酮
🗣️ 情景例句
Should children be allowed to watch violent movies?
小孩可以看暴力片吗？
How are you going?Are you going by boat?
你怎样去?坐船去吗？
Give me a break.
饶了我吧。