Dibenzphenanthrene
二苯并菲
🗣️ 情景例句
I'm having some trouble keeping food down.
我吃东西时感到困难。
You are better than I am.
你比我好。
He's awful!He telephoned me four times Yesterday, and three times the day before yesterday.
他讨厌透了！他昨天给我打了4次电话，前天打了3次。