国家财富的增长主要取决于生产力的提高。

You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.

沉默是如此精确。

我们不能向您保证我们将实现今年所有的目标，过去几年我们也没有实现所有的目标，但我们可以向您保证，我们将执着于用户体验 。