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说明原因型模块 These dayswe often hear that .It is common that . Why does such circumstance occurin spite of social protects? For one thing, .For another, . What is more,since ,it isnatural that .To solve the problem is not easy at all, but is worth trying.We should do something such as to improve he present situation, and I dobelieve everything will be better in the future. 注释： 1、提出论题 2、说明现状 3、理由一 4、理由二 5、理由三 6、理由三引起的后果 | 
