<正>How much exercise do I need?How many times do you exercise a week?We know that we need exercise to stay healthy.Exercise is good for us,but how much is enough1?我需要做多少运动?你一周锻炼几次呢?我们知道,我们需要锻炼来保持健康,锻炼对我们有好处,但是多少才够呢?
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