Nbr
abbr. 腈基丁二烯橡胶（nitrile -butadiene rubber）
🗣️ 情景例句
What do you mean?
你是什么意思呀？
They're calling your flight now.You barely have time to make it.
他们正在定航班。你刚刚有时间做。
The boys felt tired so they put out the fire and crept into their tent.
于是他们扑灭了篝火，钻进了帐篷。