求翻译：6. 只有经过教师修改的东西才值得牢记。不要反复去看那些做了而未经别人修改的练习，看多了就会不自觉地连同错误的东西一起记在脑了里。假如你纯属自学而无旁人相助，那你就去记那些肯定是正确无误的东西。是什么意思？

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6.It is only through a teacher changes only when something is worth bearing in mind. Those who do not have repeatedly to look at the others, without modification, has seen a lot of exercises will not consciously together with erroneous things together, remember that in the brain. If you are purely s

6. Only then the thing which revises after the teacher only then is worth keeping firmly in mind.Do not look repeatedly but these have done not after others revision practice, looked many has been able not on own initiative together to record together with the wrong thing in the brain in.But if you

6. only a teacher modified things worth remembering. Don't repeatedly went to the people who do without others modify exercises, the Bulls will unconsciously in mind in the brain, along with the wrong things. If you are purely self-study and not somebody else came up trumps, then you are to remember

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