作为非洲人就是现代人——这是我们必须接受的核心悖论。

Human kindness has never weakened the stamina or softened the fiber of a free people. A nation does not have to be cruel to be tough.

每天我都发现越来越多的美好事物，这足以让人疯狂。

In science, patience is not just a virtue; it's a necessity.

实验中的每一次失败都是离成功更近的一步。

The knowledge of the past stays with us to spur us on to new and better things.

The actions of men are the best interpreters of their thoughts.