reserve tractive force的用法和樣例：
例句
- The real time calculation of tractive force and braking force is the core of the system.
它的核心是能夠實(shí)時(shí)計算得到機車(chē)運行過(guò)程中的牽引力和制動(dòng)力。 - If the pulling force is equal to the friction, the car will continue forward at the same speed.
如果牽引力等于摩擦力，車(chē)子將勻速前進(jìn)。
