Dnn
[医][=1，5-dinitronaphthalene]1，5-二硝基萘
🗣️ 情景例句
I'm worried about you and Mom.
我很担心你和妈妈。
Morning, How are you?
早，你好吗？
Oh dear! You're right.It's closed.
哎吆！你说得对，是关着的。