Natrometer
测钠计, 钠量计
🗣️ 情景例句
Scientists have confirmed that the Earth is, indeed, round.
科学家证实，地球确实是圆的。
What time should I meet you at the station?
我几点中跟你在火车站碰头呢？
It's none of your business!
这不关你的事儿！