The only limit to our realization of tomorrow is our doubts of today.
The pursuit of knowledge is a journey without end, and that's what makes it exciting.
The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used.
当你失败时,那就是你站起来再试一次的时候。没有理由就这样倒下。
"The most dangerous kind of waste is the waste we do not recognize."