Frictionometer
摩擦系数测定器; 摩擦系数测定仪
🗣️ 情景例句
We'll come upstairs and get you in a little while.
我们待会儿就上楼来带你下去。
My brother used to speak French to me all the time.
我的兄弟过去总是对我说法语。
The doctor says that he will come at once.
医生说他马上就来。安迪，