Sweet potatoes, yams, beets, and leeks are some other root vegetables that people like to eat.
红薯、山药、甜菜和韭菜是人们喜欢吃的其他几种块根类蔬菜。
Imagine that there are two goods in the world-meat and potatoes. And there are two people in the world - cattle rancher and a potato farmer - each of whom would like to eat both meat and potatoes.
试想一下，如果世界上只有两项货物-肉和土豆，两个人-一个牧场主和一个种土豆的农夫，并且这两个人都既喜欢吃肉，又喜欢吃土豆。
Some people like watching TV and eating snacks all day on the couch. No wonder they are called couch potatoes.
有些人喜欢整天蜷缩在沙发上看电视吃零食，难怪人们称他们为“沙发上的懒汉”。
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