More than half a century ago, the Massachusetts Institute of Technology (MIT) opened its Center for Advanced Visual Studies (CAVS) to explore the role of technology in culture.

半个多世纪前，麻省理工学院（MIT）开设了高级视觉研究中心（CAVS），探索科技在文化中扮演的角色。

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The story begins almost half a century ago.

故事发生在大约半个世纪以前。

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The first draft was written half a century ago.

但这部法律的初稿在半个世纪前就诞生了。

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He and his brother-in-law,E.J.Cossman, created the Uncle Milton Ant Farm more than a half century ago.

VOA: special.2011.02.15

That might not have been true a half century ago.

这在半个世纪前本无法实现。

普林斯顿公开课 - 人性课程节选

A half-century ago,for example, producing genetic copies of animals was only a dream of scientists.

VOA: special.2010.03.23

Half a century ago, IBM and organized labor were both monoliths of power and influence in America.

FORBES: Big Labor Should Learn From Big Blue

Half a century ago, the drug was used to treat nausea and caused birth defects.

FORBES: Inside Medicine

Rather like shipbuilding half a century ago, he says, shipbreaking is a boom-and-bust business.

ECONOMIST: Shipbreaking