Dnn
[医][=1，5-dinitronaphthalene]1，5-二硝基萘
🗣️ 情景例句
And so...
所以……
Extremes meet.
否极泰来。
he had great difficulty in controlling the car because a tyre burst during the first run.
但他很难把汽车控制住，因为在开始的行程中爆了一只轮胎。