什么是马力呢? 要弄清这个问题,先得知道什么是功。我们把一块石头从这里移到那里,把火箭从地球上发射到高空去,都算是做了功。具体点说,就是使用一种力量,把物体在力的方向上移动了一个距离,就算是做了功。功,包含着力和距离,少一样也不行。譬如,一个人虽然费了 What is horsepower? To understand this issue, you must first know what is merit. We moved a rock from there and fired the rocket from Earth to high altitude. It was all done. In concrete terms, it is the use of a force that moves an object a distance in the direction of force, even if it is done. Gong, including effort and distance, is not enough. For example, although one person costs