A force is a push or a pull. “力”是指推力或拉力。

　　Force gives an object the energy to move, stop moving or change direction. “力”给予物体移动、不移动或改变方向的能量。

　　Here are some good examples of force. 这里有几个关于“力”的好例子。

　　When you write with a pen, you are creating a force. 当你用笔写东西时，你在产生“力”。

　　When you pedal your bike, you are creating a force. 当你骑你的自行车时，你在产生“力”。

　　When you blow your nose, chew your gum or swim in a pool, you are creating forces. 当你擤鼻涕、嚼口香糖或在池中游泳时，你在产生“力”。