When our nostrils are unobstructed, we involuntarily alternate breathing through one or the other about every two hours.
当我们的鼻孔畅通时，我们每两小时就会不经意地用两个鼻孔交替呼吸。
He worked out every other day with weightlifting, with some kind of running work on alternate days.
他每隔一天进行举重训练，其它的日子做些跑步训练。
Another regimen, called alternate-day fasting, involves eating no more than 500 calories every other day.
另一个方案称为“隔日禁食法”，亦即每隔一天热量摄入不得超过500卡路里。
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