Hondrometer
粒度计, 微粒特性测定计
🗣️ 情景例句
I've been studying all day, and I'm sick and tired of it.
我学了一天，现在感到厌倦。
Do you often work for Mr.stone during the holidays?
你常常在假日期间为斯通先生工作吗？
That's not allowed. Once you are in here, listen to your teacher.
那是不允许的。一旦进来了，你们要听老师的话。