Dnn
[医][=1，5-dinitronaphthalene]1，5-二硝基萘
🗣️ 情景例句
Call me Philip.
叫我Philip。
His career opportunities suddenly looked brighter.
他似乎突然又有希望飞黄腾达了。
You must always return your library book on time!
你必须按时归还图书馆的书！