粒子的概念只是近似的,并且只有在动量较小的极限下才有意义。
最好的创新方式是冒险。
I believe in the power of intention and hard work.
I don't believe in retirement. I believe in continuing to work as long as you're able.
A proof is a repeatable experiment in persuasion.
信仰是在你看不见整段楼梯时就踏出第一步。