millennia

名词 millennium:

1. a span of 1000 years
   同义词：millennium, millenary
2. (New Testament) in Revelations it is foretold that those faithful to Jesus will reign with Jesus over the earth for a thousand years; the meaning of these words have been much debated; some denominations (e.g. Jehovah's Witnesses) expect it to be a thousand years of justice and peace and happiness
   同义词：millennium
3. the 1000th anniversary (or the celebration of it)
   同义词：millennium, millenary

1. In the course of millennia the dinosaurs died out.
   在几千年的时间里，恐龙逐渐死绝了。