One of the most significant barriers to people doing things in the world, to actually introducing change is that they underestimate their ability to bring about change.

人若想在世间有所为,真正实现改变，面对的最显著障碍之一,是他们低估自己实现改变的能力。

哈佛公开课 - 幸福课课程节选

Well basically what we're doing is we're giving ourselves the ability to create data types the same way that we have some built-ins, so we have things like int, float, string, these are built-in data types.

就是要赋值我们自己创建,和内置的数据类型,相同的数据类型的能力,我们有一些内置的数据类型，如int，float，string等，如果你考虑下这些数据类型。

麻省理工公开课 - 计算机科学及编程导论课程节选