The farmer is the only man in our economy who has to buy everything at retail, sell everything at wholesale, and pay the freight both ways.
PID控制器的本质在于它能够根据系统的过去和现在状态预测其未来行为。
In cinema, less is often more.
成为一名作家就是在每一天的寒冷时分坐在桌前写作;而不是等待天才的蓝色火焰从胸骨中喷涌而出。