他驳斥了地球是宇宙中心的观点。
He refuted the idea that the earth was the center of the universe.
为什么古希腊人坚信地球是宇宙的中心呢？
Why did the ancient Greeks believe that the Earth was the center of the universe?
他们认为地球是宇宙的中心。
以前人们以为地球是宇宙的中心。
People used to think the earth was the center of the universe.
人们从前认为地球是宇宙的中心。
People used to believe that the earth was the center of the universe.
他们认为地球是宇宙的中心。
在中世纪，人们认为地球是宇宙的中心。
In Middle Ages, people believed the earth to be the center of the universe.
人们曾认为地球是宇宙的中心。
People used to hold the belief that the earth was the center of the universe.
人们曾认为地球是宇宙的中心。
People used to hold the belief that the earth was the center of the universe.
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