Photo credit: Becky F via Flickr CC-BY-NC-ND-2.0 「鈴…」按掉鬧鐘,迷糊的從床上爬起身來,為什麼每天早上起床時打呵欠,總是會聞到口中傳出一股酸酸的氣味呢? Photo credit: Philips Communications via Flickr...