通常他们的主要兴趣是在编写软件上面—而不是在产品或者对于产品的商业目的上。
Often they're primarily interested in writing software - not in the product or the business reasons for it.
但正如这种瀑布式方法在编写软件时是失败的一样，在电影制作时这种方法也会失败。
But just as the waterfall approach fails when we're writing software, it would fail in making a movie as well.
在编写软件时，可以按各个程序的功能将软件细分为各个功能模块，再通过主程序的调用来实现整个软件系统。
In coding software, can press each program function will software subdivision for modules, again through the main program tend to make the whole software systems.
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