历史给我们的教训是，人们从来都不知道汲取历史的教训。
History taught us is that people never know learn the lessons of history.
社会系统是个人与个人之间、群体与群体之间关系的网络。
语言的进化是为了让我们能够闲聊。
The only thing that separates successful people from the ones who aren't is the willingness to work hard.
Over time, our emerging high-usage products will likely generate significant new revenue streams for Google as well as for our partners, just as search does today.
希望是美好的，也许是人间至善，而美好的事物永不消逝。