2012年12月英语四级作文真题:Education pays

句法知识很棒，若增加一些从句的使用，文章会更出色；文章用词太过单一，要仔细检查单词拼写；缺少组织，上下文衔接稍显不流畅；请注意分段；请提高文章内敛性，段落和句子要围绕主题展开。

beyond two or three days,the food undergoes deterioration in the high humidity and temperature,especially in tropics. why do this specific environments make it impossible to protect the foods with a high degree ?I speculate that for bacteria and virus, high humidity and temperature can mean sharply multiplication.in addition,the reaction rate will be accelarated with a high temperature.