许多世纪以前，在西非，传统的说书人一边讲故事，一边演奏乐器。
Many centuries ago, in West Africa, traditional storytellers played musical instruments while they were telling stories.
巨石阵建于许多世纪以前。
伦敦作为商贸中心的基础可以追溯到许多世纪以前。
London's roots as a centre of commerce stretch back many centuries.
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