Naphthophenanthrene
二苯并蒽
🗣️ 情景例句
Excuse me, I just wanted to compliment you on the stunning decor.
不好意思，我只是想赞美一下你那了不起的装饰布置。
You'll break it, if you don't take care.
你不专心的话，就会打破。
Hi! I'm sorry I was out when you rang.
你好！我很抱歉，你打电话时我出去了。