Short run is a period of time when we can change only variable factors not fixed factors.
Think of when your writing a paper, any time your main idea changes, you have to start a new paragraph. A paragraph is about 5-8 sentances long and deals with ONE main idea.
Answer:
对不起，但我只使用翻译这一点，我不知道中国人很抱歉:(
Explanation:
