The beauty of mathematics lies in its ability to reveal the underlying simplicity in what appears to be complex.
每幅画都讲述一个故事,但不是每个人都能读懂。
可持续性不是选择,而是我们对后代的责任。
地球是一个圆点。月亮是一个圆点。太阳是一个圆点。星星是圆点。
The real and effectual discipline which is exercised over a workman is that of his customers.