Modern quarry management requires geologists' eyes, engineers' hands, and poets' hearts.

都是出卖，卖给中原各国也可以，何必非要卖给越国呢？ 

What you are you do not see,what you see is your shadow,

预测未来的最好方法就是发明它。

我想解放人们，让他们觉得自己不必只做一种人。

数学的美在于它既精确又富有创造性。