The challenge in learning is not just to memorize, but to generalize from specific examples to broader concepts.

经济发展理论研究的是经济系统如何产生不断改变它的力量。

The human heart, at whatever age, opens only to the heart that opens in return.

要真正理解宇宙，我们必须首先理解构成它的最小粒子。

The artist’s duty is to express what others cannot.

在认识到热是运动的一种形式后，没有人会怀疑热可以转化为机械效应。