The earth also is spherical, since it presses upon its center from every direction.
地球也是球形的，因为它从各个方向压迫它的中心。
-- Nicolaus Copernicus 哥白尼
The earth also is spherical, since it presses upon its center from every direction.
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The earth also is spherical, since it presses upon its center from every direction.
地球也是球形的，因为它从各个方向压迫它的中心。
-- Nicolaus Copernicus 哥白尼
