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2014年11月26日雅思写作回忆 大作文：Some people think that environmental problems are too big for individuals to solve. Others, however, believe that the problems cannot be solved if individuals do not take actions. Discuss both views and give your own opinion. 小作文是表格：The table shows the total length of high speed train tracks in three countries in 1990、2010 and the prediction for 2020. | 
