Npd
[化] 氮磷检测器
🗣️ 情景例句
There aren't window seats left, but a few enter seats are open.
那些靠窗的位子已没有了，但里面的位子还有。
You must have dialed the wrong number.
你肯定拨错了号。
Yes, may I help you?
有什么事吗？