translation.en: Well, we'll measure the amount of energy after the collision, compare it to the amount of energy before, and if there's less energy after the collision than before, this will be evidence that the energy has drifted away.
translation.zh: 我们将测量撞击后的能量， 将其与撞击前的能量作比较， 如果撞击后能量减少了， 这就证明了能量发生了逃逸