只有当我们忘记死者时，他们才对我们死去。
The dead are not dead to us until we have forgotten them.
合作是解决科学领域最大挑战的关键。
The quarry industry must evolve with technology, or risk being left behind.
国家之间最重要的区别不在于政府形式，而在于政府的程度。
Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.