Naphthophenanthrene
二苯并蒽
🗣️ 情景例句
Philip needs a day off. Philip
需要休假。
I'm not familiar with that part. Let me call someone who is more knowledgeable.
那部分我不熟悉，让我找专业人士来说明。
Mr.Taylor, the owner of a jewellery shop was admiring a new display.
珠宝店主泰勒先生正在欣赏新布置的橱窗。