Most vegetables sold on the market are not placed on ice to keep them fresh and are already seriously dehydrated after five to six hours at room temperature. Vegetables traded by wholesalers are considered 'grade B.' The fresher foods are, the more nutritious and tasty they are.
蘇慧如解釋，一般市場販售的青菜通常不「打冰」（加冰塊保鮮），在常溫下擺置 5、6 個小時後已嚴重脫水，經菜販挑揀後再行販售，就是所謂的 B 級品。