为了鼓励学生多进行手写，北京许多小学已经把书法课列为必修课。

To encourage students to handwrite more, many primary schools in Beijing have made writing classes compulsory.

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这些年来，游戏制作者们已经引进了许多进入整个生产线的创新产品。

Over the years, modders have introduced several innovations that have grown into entire product categories.

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史密斯的书是对一个广阔主题的极好介绍，并将提出许多进一步的研究方向。

Smith's book serves as an excellent introduction to a vast subject, and will suggest plenty of further lines of inquiry.

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So we'll talk a bit more about this idea of functions today, but, get int, again, can think of it as a black box, whose purpose in life is to prompt the human for input and pester the human if he or she doesn't actually give it int, but then once it has that, has entered it from the user, it's quote unquote, returns it to you.

所以我们进今天将多讨论点这个函数的概念，但是，GetInt，我们可以把它当做一个黑盒子，它的唯一目的是提示人们来输入,并且如果他或她没有,给它int数，则会纠缠用户，但是一旦它得到了，用户输入的int数，对输入进行引用，返回给你。

哈佛公开课 - 计算机科学课程节选