你太慷慨了，不要跟我开玩笑。如果你的感情仍然和去年四月一样，请立刻告诉我。我的感情和愿望没有改变，但是你的一句话将永远让我对这个问题保持沉默。

我们最大的弱点在于放弃。成功最可靠的方法就是再多尝试一次。

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！"

Tradition and innovation must walk hand in hand for agriculture to thrive.