The man in the planning room, whose specialty under scientific management is planning ahead, invariably finds that the work can be done better and more economically by a subdivision of the labor.

The balance between energy needs and environmental protection is the challenge of our time.

我们就是我们记住的东西。

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

我们常常认为贫穷是缺钱，但它也是缺乏信息和机会。