解析：知道自己还有所不知，这是很高明的。不知道却自以为知道，这就是很糟糕的。

瀑布歌唱道：“当我找到了自己的自由时，我找到了我的歌。”

At that age， I'd take any excuse to make estimates and do minor arithmetic. I'd calculate our gas mileage -- figure out useless statistics on things like grocery spending. I'd been hearing an ad campaign about smoking. I can't remember the details， but basically the ad said， every puff of a cigarette takes some number of minutes off of your life: I think it might have been two minutes per puff. At any rate， I decided to do the math for my grandmother. I estimated the number of cigarettes per days， estimated the number of puffs per cigarette and so on. When I was satisfied that I'd come up with a reasonable number， I poked my head into the front of the car， tapped my grandmother on the shoulder， and proudly proclaimed， "At two minutes per puff， you've taken nine years off your life！"

Education does not plant the faculties in us like seeds in a garden; it merely directs them in the way they should go.

Future computing will be more inclusive, allowing everyone to enjoy the benefits of technology.

即使在最黑暗的时刻，幸福也有迹可循，只要记得点亮灯。

如果你身陷地狱，那么就继续前行。

优化不是追求完美，而是在现有信息和资源下做出最佳决策。