However, similar changes occurred when the subjects were asked simply to open their mouths or to breathe deeply.
然而，受试者仅仅被要求张嘴或深呼吸时，也有类似的变化发生。
Because the resistance makes it harder work simply to breathe, your body is half-waking up over and over again during the night, so you don't feel refreshed in the morning.
因为阻力会让简单的呼吸变得艰难，夜间的时候你的身体反复地处于半睡半醒状态，所以早晨的时候你就会感觉没有精神。
Now open your eyes and simply breathe.
现在睁开你的眼睛并简单地呼吸。
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