And if you haven't realized already, do realize per the tutorials that we've linked to online, you can do things like duplicating sprites, you don't have to re-implement the whole thing.

如果你还没有意识到这一点，再想想我们制作出来的一个个在线教程，你可以像复制这些小精灵们一样完成你整个浩瀚的工作，你没有必要一个一个重复地去制作。

哈佛公开课 - 计算机科学课程节选

We're familiar with polymers, plastics in our daily life; the chairs that you're sitting on are made of a kind of a plastic polymer that is basically an organic chemical that is cross-linked together.

我们应该很熟悉聚合物,比如日常生活中的塑料就是,你们坐的椅子,就是由一种塑料聚合物构成,它由基本的有机化学物质交联在一起

耶鲁公开课 - 生物医学工程探索课程节选