在19世纪30年代以前，美国的大多数报纸都是通过年度订阅销售的，通常是一年8到10美元。

Before the 1830s, most newspapers were sold through annual subscriptions in America, usually $8 to $10 a year.

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上世纪30年代以前，所有的经济低迷都称作萧条。

Before the 1930s all economic downturns were commonly called depressions.

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在上世纪六十年代以前，语言的符号表征一直被视为是人类的专利。

Until the 1960s, symbolic representation of language was thought to be uniquely human.

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I think that many years ago, in the early 90s or 80s, or the 70s even, it was a very dangerous city.

我想很多年以前的八九十年代或者甚至七十年代，它是一个非常危险的城市。

在上西区 - SpeakingMax英语口语达人