Every problem in mathematics has a solution; it's just a matter of finding the right path.
Great things never come from comfort zones.
Coal’s future depends on our ability to make it cleaner and more efficient.
有两样东西,人们越是经常持久地对之凝神思索,它们就越是使内心充满常新而日增的惊奇和敬畏:我头上的星空和我心中的道德律。