高中英语 劳逸结合(Fatigue and Rest)作文素材_第1页
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1 劳逸结合劳逸结合 Fatigue Fatigue andand Rest Rest Fatigue and Rest Scientists have made an interesting experiment about fatigue When a muscle in the body works it produces lactic acid and it is this lactic that makes the muscle tired Fatigue is not just a chemical process it is also a biologi cai process We can t just remove fatigue we must allow the cells of the body to rest Damages must be repaired nerve cells of the brain must be recharged the joints of the body must replace used up lubricants Sleep will always be necessary as a way of restoring the body s energy after fatigue However a person who has been working hard at his desk for hours may not want to lie down at all when he is tired He d rather takea walk Or when children come home from school they want to run out to play not to lie down and rest The reason is that if only a certain part of the body is tried the best way to make that part feel fresh again is to make other parts of the body active We can actually rest by means of activity Of course if you are to
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