响亮的音乐响起，街上的小贩正在煎土豆和甜甜圈。
Music blared and street vendors were frying potatoes and doughnuts.
很容易得见，交易能够使他们享受到更多的选择：他们都可以吃到夹着法式煎土豆的汉堡牛排。
It is easy to see that trade would allow them to enjoy greater variety: Each could then have a hamburger with French fries.
琼斯先生和夫人去一家饭店吃早餐，那里有1.99美元的“老年特价餐”包括二个鸡蛋，熏肉，煎土豆丝和烤面包片。
Mr. and Mrs. Jones went to breakfast at a restaurant where the "seniors'special" was two eggs, bacon, hash browns and toast for $1.99.
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