我认为目标永远不应该容易，它们应该迫使你努力，即使当时让你感到不舒服。
I think goals should never be easy, they should force you to work, even if they are uncomfortable at the time.
Sustainable energy solutions will define the 21st century.
物理学家是一位探险家，他不满足于停留在已知世界的边界内。
这世上没有什么是我害怕说出口的。
Memory is the only paradise from which we cannot be expelled.
The problem is not that we laugh too much， but that we laugh about everything.
