they give you a chance to rest between exercises为什么这里exercises用复数?

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theygiveyouachancetorestbetweenexercises为什么这里exercises用复数?theygiveyouachancetorestbetweenexercises为什

they give you a chance to rest between exercises为什么这里exercises用复数?
they give you a chance to rest between exercises为什么这里exercises用复数?

they give you a chance to rest between exercises为什么这里exercises用复数?
有between就是两个之间,两个exercise当然要复数