First, read the English article below.

A prototype usually focuses on the main feature of the program. For example, if you're creating a personal organizer program, your prototype may be the calendar and event-adding function. Your prototype should be able to be used as its own program. It will be the foundation of everything else, so make sure its working properly. As you iterate on the feature, continue to refine it until it works smoothly and efficiently.  The prototype allows you to make rapid changes and then test them out. Have others test your prototype to ensure that it functions properly. Expect the prototype to change as you work on it. The whole point of the prototype is to experiment before committing. The prototype allows you to see if the features you want are possible before you dive into coding the program proper. If the prototype is doomed to fail, scrap it and return to the drawing board. It will save you a lot of headache down the line 

Now, please write a short abstract for it in Chinese. Abstract:
将精力集中在一个功能上。 反复迭代直至功能实现。 不要害怕丢弃程序原型。