Grant was beginning to learn an important lesson of the war.

VOA: special.2009.12.03

Important lesson, so that there would be some predictability in the results and I would have some, if you will, smoke test for knowing whether or not I was getting, my code seemed to be working.

这很重要，因为这样我就可以预测,结果会是多少了，如果你愿意，我们可以做烟气试验,来看我的代码是否工作正常。

麻省理工公开课 - 计算机科学及编程导论课程节选

In the process,he says, he learned an important lesson about baking and life.

VOA: standard.2010.07.16

Dietitians and health experts say understanding how important our food choices are, and learning a lesson or two from the world's healthiest nations, can help us live healthier,too.

VOA: standard.2010.02.23