Natrometer
测钠计, 钠量计
🗣️ 情景例句
Philip and I were living with Grandma and Grandpa. Philip
与我和爷爷， 奶奶住在一起。
We had a good time.
我们过得很愉快。
When the instrument is situated at more than 700 miles from the earthquake centre,
如果把这种仪器安装在距震源700多英里远的地方，