第一时代公元前15000年到公元前6000年，第二时代公元前5000年至公元前3500年。第三时代公元前3000年至公元前1000年。的翻译：15000 BC to 6000 BC in the first age, the second time from 5000 BC to 3500 BC. The third age from 3000 BC to 1000 BC. 什么意思？中文翻译英文，英文翻译中文，怎么说？

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The first era of 15,000 years BC to 6000 BC, the second era of 5000 BC to 3500 BC. The third era of 3000 BC to 1000 BC.

15000 BC to 6000 BC in the first age, the second time from 5000 BC to 3500 BC. The third age from 3000 BC to 1000 BC.

First time 15000 B.C. to in 6000, second time from 5000 to in 3500.Third time from 3000 to in 1000.

The first time the BC, 15,000 BC, 6000 BC era 2 5000 BC to 3500. The first 3 BCE era 3000 BC to 1000.

15000 BC to 6000 BC in the first age, the second time from 5000 BC to 3500 BC. The third age from 3000 BC to 1000 BC.