自2006年以来它已被列入第一批国家非物质文化遗产。越剧最初出现在清朝浙江省的嵊县，后来于二十世纪二十年代闻名于上海。

It has been listed into the first national nonmaterial cultural heritage since 2006. Yue opera appeared in Sheng County, Zhejiang Province in the Qing dynasty, and then it became famous in Shanghai in the 1920s.

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在二十世纪二十年代，在美国出现了有关爵士乐的争论。

In the nineteen twenties, there was a debate in the United States about jazz music.

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在二十世纪二十年代，玛丽安·安德森赢得了两场唱歌比赛。

In the nineteen twenties Marian Anderson won two singing competitions.

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That's very nice. So basically, you get a lot of benefit supposedly from this 7-Up soda from the 1920's or so.

这非常好，因此基本上，在二十世纪二十年代,喝到这样的七喜恐怕对你大有好处。

麻省理工公开课 - 化学原理课程节选

Because it was in the 1950's or so, maybe the late 1940's, that people started to discover lithium, even though it had no natural function, it did do something in our bodies.

因为在二十世纪五十年代左右，可能是四十年代末期，人们开始发现锂，尽管不参与人体的正常生理活动，但是它确实会对我们的身体产生影响。

麻省理工公开课 - 化学原理课程节选

An old crony and former colleague of mine was taking a course at Johns Hopkins in the 1960s.

我的一个老朋友也是我的大学同学,二十世纪六十年代的时候在约翰斯，霍普金斯大学上学。

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