Dnn
[医][=1，5-dinitronaphthalene]1，5-二硝基萘
🗣️ 情景例句
She'll be back around 2:30.
大概两点半会回来。
Excuse me I couldn't tell you beforehand.
对不起我不能事先告诉你。
Oh, dear. I forgot to tell you. Would you like to come?
哎唷。我忘了告诉你。你愿意来吗？