过去是一个装满光的橱柜，你只需要找到打开门的钥匙。

The best programs are written so that computing machines can perform them quickly and so that human beings can understand them clearly. A programmer is ideally an essayist who works with traditional aesthetic and literary forms as well as mathematical concepts, to communicate the way that an algorithm works and to convince a reader that the results will be correct.

儿童教育是人类最重要的一个问题。