Machinery and labor-saving devices are only valuable as they serve to reduce the cost of manufacture.
I don’t live in the past. I don’t live in the future. I live now.
Stop being afraid of what could go wrong and think of what could go right.
量子力学的本质在于它提供了一个数学框架,用于描述原子和亚原子粒子的行为。
最大的风险就是不冒任何风险。