问题描述：
keep it off ,it 指什么
Proper dieting can not only help a person lose ugly excess fat,but can also help him or her to keep it off and to lead a more active,happier and healthier life.
Proper dieting can not only help a person lose ugly excess fat,but can also help him or her to keep it off and to lead a more active,happier and healthier life.
问题解答：
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