物体的加速度与所受的合外力成正比，与物体的质量成反比。加速度的方向与合力的方向相同。

The secret of change is to focus all of your energy not on fighting the old, but on building the new.

The music is my truth, and I’ll never compromise that.

贫穷的时候最能表现出一个人是否清廉，富裕的时候最能表现出一个人是否讲求仁义。

The greatest threat to our planet is the belief that someone else will save it.