“小姐!你过来!你过来!”顾客高声喊,“看看!你们的牛奶是坏的,把我的一杯红茶都糟蹋了!”“真对不起!”服务小姐一边陪着不是,一边笑着说,“我立刻给您换一杯。”新红茶很快准备好了,碟边放着新鲜的柠檬和牛乳。小姐轻声说:“我是不是能建议您,红茶如果放柠檬,就不要加牛奶,因为有时候柠檬酸会造成牛奶结块。” “Miss! You come over! You come over!” The customer shouted, “Look! Your milk is bad, and I’m spoilt for a cup of black tea!” “I’m sorry!” The waitress was accompanied, not laughing. Said, “I’ll give you a quick drink.” New black tea is quickly prepared, fresh lemon and milk are on the plate. The young lady whispered, “I can’t recommend you. If you put lemons on black tea, don’t add milk, because sometimes citric acid will cause milk to clump.”