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锻炼的好处,这里已经无需赘述。问题是,知易行难,真要开始锻炼并长期坚持下去,困难就来了。
The benefits of exercise, no need to repeat here. The problem is that it is difficult to know what to do and if it is really necessary to start exercising and to persevere in the long run, difficulties will come.