The energy from your arm is transferred to a small flywheel in the car.
The energy from your arm is transferred to a small flywheel in the car.
就是你得拿着小车反复的将它往前推几下，你手臂上的能量就传到了小车当中的变速轮上。
The energy from your arm is transferred to a small flywheel in the car.
就是你得拿着小车反复的将它往前推几下，你手臂上的能量就传到了小车当中的变速轮上。