That question, posed by Jack Kerouac on behalf of the Beat generation half a century ago, is the biggest uncertainty hanging over the world economy.

半个世纪前，杰克·凯鲁亚克代表垮掉的一代提出了这个问题。它表明了当今世界经济的最不确定性，也反映了美国选民们的最大担忧。

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The United States invented the modern solar cell over a half century ago.

美国在五十年前就已经研发出了现代太阳能电池。

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In pursuit of understanding the nature of peace, I have studied the construction and operation of international orders ever since I was a graduate student well over half a century ago.

为了寻求对和平的理解，半个世纪前身为研究生的我就开始研究国际秩序的建立和运作。

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Cable television started out over a half century ago as a way to get better reception for broadcast channels.

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Is it appropriate to expect this generation to submit to the decisions and arrangements established over half a century ago?

NPR: Transcript of Ahmadinejad's U.N. Speech

"The quality of the tape left a bit to be desired - it was over half a century ago - but the spirit and rawness suggest a whole scene waiting to happen, " he said.

BBC: Tapes by Ringo Starr's first band found