Macfarlane guessed that the fact that water had to be boiled, together with the stomach-purifying properties of tea meant that the breast milk provided by mothers was healthier than it had ever been.

麦克法兰猜测，水必须煮沸这样的事实，加上茶净化胃的特点，意味着母亲提供的母乳比以往任何时候都更健康。