The only limit to our realization of tomorrow is our doubts of today.
天然气将在向低碳未来的过渡中发挥关键作用。
The difference between ordinary and extraordinary is that little extra.
Never stop learning—the moment you think you know everything is the moment you fall behind.
模糊集的概念为构建一个在许多方面与普通集框架平行的概念框架提供了一个方便的出发点。