艺术中没有必须，因为艺术是自由的。
"The truth is rarely pure and never simple."
Innovation in natural gas extraction is key to meeting the world's growing energy demands.
我很害羞，信不信由你。这是真的。
在分布式系统中，关键挑战是在不可靠的组件之间达成共识。
鱼在江湖中互相遗忘，人在道术中互相遗忘。
It is only shallow peoplewho require years to get rid of an emotion. A man who is master of himself, can end a sorrow as easily as he can invent a pleasure.