1、The relative speed between driving wheel and pin rail varies with sinusoidal function.
驅(qū)動輪和銷軌的相對速度按正弦函數(shù)變化。

2、Our special speedometer shows that the relative speed between the two trains is 20 MPH.
我們特制的測速儀表現(xiàn)這兩列火車的相對速率是每小時20英里。

3、But, if you run the motor power at around 60 you will get a relative speed of 6-10 feet per minute.
但是，如果您運行的電機(jī)功率約為60你會得到一個相對速度為每分鐘6 - 10米。

relative speed翻譯