To understand the land is to understand ourselves.
诗人是一个小小的神。
过去并未死去,它甚至还未过去。
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。
追求真理是人类最高尚的事业。
The only thing we have to fear is fear itself.