所以當年紀大嘅輪班員工返屋企 想喺日頭訓覺 ， 就會超攰 佢哋嘅生理時鐘就會同自己講 ︰ 「 起身啦 ， 係時候起身囉 。 」
So when older shift workers come home and want to sleep during the day, their circadian clock will say to themselves, "Get up, it's time to get up." 」