思慕雪出现于六十年代的美国，当时冰淇淋零售商和健康食品商店开始出售它们。

Smoothies became available in the United States in the late 1960s when ice cream vendors and health food stores began selling them.

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20世纪五六十年代，美国艺术的创造力达到了顶峰。

American art reached a peak of creativity in the '50s and '60s.

《柯林斯英汉双解大词典》

牛仔已经在美国西部和西南部生活和工作了三个多世纪，他们是美国著名的象征，所以你看那些五六十年代的好莱坞牛仔电影时，你看到的是一份工作。

Cowboys have lived and worked in the west and southwest of the United States for over three centuries and they are a famous symbol of the US. When you watch those old Hollywood cowboy films from the fifties and sixties, you see a job.

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