Stagnating middle incomes in the US date back to the mid-1970s.

美国中产阶级收入的停滞开始于十九世纪七十年代中期。

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The basic concept of Web Services can be traced back to the mid-1960s in the United States.

Web 服务的基本概念可以追溯到美国 60 年代中期。

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Output per hour there fell by 0.5% last year, continuing a negative trend that dates back to the mid-1990s.

去年每小时产量在那里下降0.5%，延续了追溯到90年代中期的消极趋势。

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So we'll come back and revisit the idea that repeating an interaction may allow you to obtain cooperation, but we're not going to come back to that until after the mid-term.

我们以后再继续探讨为什么,重复能够促成合作,我们在后半学期再探讨这个问题

耶鲁公开课 - 博弈论课程节选

Funfair Park is situated on 2.5 hectares and dates back to the mid-19th Century.

BBC: Budapest with children

Coal Gasification is a well-known, tried and true technology, dating back to the mid-1800s.

FORBES: Underground Coal Gasification: A Trend Worth Watching

The papers, which date back to the mid-1500s, were discovered at the Dunham Massey estate near Altrincham.

BBC: King Henry VIII letter found at Dunham Massey