开采效率不仅对利润有好处,对地球也有好处。
We are going to die, and that makes us the lucky ones. Most people are never going to die because they are never going to be born.
No one is useless in this world who lightens the burdens of another.
PID控制器是控制工程师的通用工具,适用于各种各样的过程。
No matter what people tell you, words and ideas can change the world.