I love the man that can smile in trouble, that can gather strength from distress, and grow brave by reflection.
In the realm of mathematics, every problem is an opportunity to discover something new.
经济增长和环境责任之间的平衡是我们这个时代的决定性挑战。
一个人最危险的敌人是他自己的口舌。
The human being is a most curious creature.