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Two main glacial epochs affected both areas during the last 100 million years of Precambrian times.在前寒武紀的最后1億年中，兩個主要的冰川時期對兩個地區(qū)都產(chǎn)生了影響。Great men, like great epochs, are explosive material in whom tremendous energy has been...

Two main glacial epochs affected both areas during the last 100 million years of Precambrian times.在前寒武紀的最后1億年中，兩個主要的冰川時期對兩個地區(qū)都產(chǎn)生了影響。Cubism , Abstractionism, and Pop art have all been epochs in the postrealistic era.立體派 ...