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!"
他有办法让她感到安全,即使是在最不确定的时刻。
我是世界上最幸福的人。也许其他人以前说过这样的话,但没有一个说得那么有道理。我甚至比简还要快乐;她只是微笑,我是大笑。
想想!使用VLSI,我们可以在1平方厘米中包装100个ENIACS。
Sustainable development requires balancing economic growth with ecological protection.