导入部分:
第1段提出一种现象或某种困难作为议论的话题
正文部分:
第2段 Many ways can help to solve this serious problem, but the following may be most effective.First of all...Another way to solve the problem is ...Finally...(列出2~3个解决此类问题的办法)
结论部分:
第3段These are not the best but the only two/ three measures we can take.But it should be noted that we should take action to...(强调解决此类问题的根本方法)
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