快餐受欢迎是因为方便,节约时间,即可在快餐店里吃又可以带回家吃.从营养学分析快餐又不尽人意.建议：如果时间来不及可考虑吃

Convenience makes fast food popular,it can save you time,and you can either eat there or take them home.One thing is that their nutritious value isn't good enough.Suggestion:If you haven't got time then you can consider about fast food,but better just occasional treat.Children should eat as less as possible.

Fast food is popular because of convenience. It saves time, you can either eat at the restaurant or bring the food home.
In terms of nutrition, however, fast food is not good enough.
Advice: ...

fast food is popular for its convenience and saving time ,we can take it home or have it at the
restaurant. while it is not satisfactory as to its not having nutrition.so i suggest that if you have time,you had better not have fast food,but you can have a taste at times.last,children had better not have too much.

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