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 alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.
A computer program does what you tell it to do, not what you want it to do.
有时候正确的道路并不是最容易的那条。
分析的整个发展和运算过程现在都可以通过机械来执行。
未来不是我们进入的，未来是我们创造的。
"The world is not a problem to be solved but a mystery to be lived."