Nbr
abbr. 腈基丁二烯橡胶（nitrile -butadiene rubber）
🗣️ 情景例句
Fifty years? Wow!
五十年？ 喔！
All things are easy that are done willingly.
做事乐意，诸事容易。
I waited by the kitchen door.
我在厨房门旁等着。