Dnn
[医][=1，5-dinitronaphthalene]1，5-二硝基萘
🗣️ 情景例句
John and I celebrate our fortieth anniversary next month.
下个月John和我将庆祝我们的结婚四十年纪念。
The napkin is dirty, Would you bring me a clean one, please?
这餐厅是脏的，请你拿个干净的给我。
Look at those black clouds. It's going to rain.
看那成堆的乌云，要下雨啦！