2015年高考作文优秀范文：移民火星

采用了适当的衔接手法，层次清晰；可适当增加从句的使用；文章词汇使用丰富度还要提高，高级词汇的积累上也要再接再厉。

Firstly, the advantages of genetically modified food are multiple but the most obvious one is its high production. As the world population keeps going up,the demand for food supply increases every year. However, most of the farmers use the conventional ways to produce food which means low-yielding. Nonertheless with the development of science and technology, some scientists have been able to make new plants by changing the genetic materials. It is fact that genetically modified food can generate several times as much food for humans compares to the conventional ways to produce food. So the production of genetically modified food means a solution to the problem of increasing severe food shortage . In addition, unlike some traditional ways to produce food, the generation of genetically modified food which applied modern molecular biotechnology indeed do not use fertilizer and pesticides causing no pollution to the air, which is of great importance to the importance to the environment.