Natrometer
测钠计, 钠量计
🗣️ 情景例句
Sure. Would you please sign your name on the back, sir, with your passport number?
每问题。先生，请您在支票背后签上名字和护照号码。
How much is it?
多少钱？
Put them away, please. You must look after your things.
把他们放好。你得能看好自己的东西。