语音讲解：
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　　The appetite grows by eating.

　　胃口越吃越大。---拉伯雷

　　【世博精解】

　　appetite means physical desire, esp for food or pleasure.是指肉体的欲望(尤指对食物或享乐)，食欲，胃口的意思。例如：When I was ill I completely lost my appetite.我生病时完全没有食欲。Don’t spoil your appetite by eating sweets before meals.饭前不要吃糖以免影响食欲。

　　Appetite also refers to instance of a natural desire for sth. (对某事物的)自然的欲望。例如：He was an amazing appetite for hard work.他出奇地喜爱艰巨的工作。

　　这句格言实际就是形容一种贪婪的欲望。