煩請改改文法～

The first principle states that people are faced with trade-off . This means that there is no such a thing- free lunch . Some of the large supermarkets or chain stores don't stop selling their merchandise which may be overdue there even if they have known it . Once customers buy this kind of merchandise , trade-off will happen to them . As a result , the firms will earn more money .

In the first principle, people face tradeoffs. It means that there is no such things as free lunch. Some of the large supermarkets or chain stores, they know their merchandises are overdued, they also will not to abandon them. As long as someone to buy it, there are tradeoffs and they are having more money.

For the first principle, people face tradeoffs. That means there is no such thing as free lunch. Although some of the large supermarkets or chain stores know their merchandising overdue, they also will not abandon them. As long as someone buy it, there is tradeoff and the firm are having more money.


chain stores........plural
no such thing ....should be singular since free lunch is a singular noun
Although should be used at the beginning of sentence
will not abandon........delete to (future tense)
someone buy....delete to