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- Task four: Ss are asked to have further discussion on what the factors are that led to Brailles' success in inventing the system? What can they learn from his example? （这个任务是将讨论引入了一个更高的层面：理想和现实。学生需要结合课文内容及更广泛的语言来完成任务。最后的讨论结果是开放式的，延续到课后。）
