求翻译：Copernicus did not announce his ideas. He did not want to make trouble. But he could not hide the scientific truth. So he talked about his theory with his friends, who strongly advised him to have his work published. His great book, On the Revolutions of the Heavenly Bodies, appeared at the very end of his life. Copernicus saw the first copy on the day he died, May 24, 1543.是什么意思？

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