But it is a very handy way of thinking about, not just how to program, but how to break problems down into nice sized chunks.

但是它确实是一种很方便的思考方式，不仅仅限于编程序,在将程序分解为小部分时也很有用。

麻省理工公开课 - 计算机科学及编程导论课程节选

You can very quickly drive yourself nuts by sitting down, thinking, oh, I can write this program, no sweat, and then you write it and then there's a tiny little mistake here, but then there's a tiny little mistake here and here, and all of these stupid little things cascade until you try running your program, and the thing just doesn't work.

如果你只是仅仅干坐着，不费吹灰之力，凭空幻想着我可以把这个项目搞定，你会想地发疯的，也许你会写出一点东西出来，可能会有一点点错误,紧接着这或那又出现一点小错误，这些小错误一点一点地堆积了起来,直到你开始运行你整个项目，你会发现这堆东西根本就不工作。

哈佛公开课 - 计算机科学课程节选