The 19th French mathematician Michel Chasles(1793-1880)not only did creative work in geometry, but made great achievement in the history of mathematics as well.
19世纪法国数学家沙勒不仅在几何学领域有着世界一流的创造性工作，而且在数学史领域也颇多建树。
The 19th French mathematician Michel Chasles(1793-1880)not only did creative work in geometry, but made great achievement in the history of mathematics as well.
19世纪法国数学家沙勒不仅在几何学领域有着世界一流的创造性工作，而且在数学史领域也颇多建树。
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