Many of them are several centuries old.

其中有很多都有几百年的历史了。

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Those simultaneous challenges appear less overwhelming with increasingly better answers to a centuries-old question: how to make power portable.

这些同时出现的挑战似乎没有那么势不可挡。对于一个存在了几个世纪的问题——如何让电力变得便携——它们给出了越来越好的答案。

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These include the centuries-old custom of "bul", where leaders would call a temporary stop to fishing for key species in order to give fish stocks an opportunity to replenish.

这些传统包括几个世纪以来被称之为“bul”的旧习俗，领导人会要求暂停捕捞一些重要种类的鱼，给鱼类总储备量繁衍补充的机会。

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Thousands of buildings were reduced to rubble, including centuries old churches.

VOA: standard.2010.04.06

Most education follows the centuries old model of teacher as information source and student as lucky recipient.

FORBES: Best Buy's Success Secret

Iranian rice farms depend completely on cultivation techniques many centuries old and it is impossible to compete.

BBC: Iran drought hits rice farmers

The Gandharba, Badi and Dami communities have long been the guardians of the centuries old musical traditions of Nepal.

UNESCO: Culture