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Leonhard Euler - Wikipedia, the free encyclopedia

萊昂哈德·尤拉  - 維基百科，自由的百科全書

Puzzle_2

Photo Jigsaw Puzzle of Leonhard Euler/figuier from Mary Evans

Photo Jigsaw Puzzle of LEONHARD EULER (1707-1783). Swiss mathematician and physicist.

Photo Jigsaw Puzzle of LEONHARD EULER (1707-1783). Swiss mathematician and physicist.

Photo Jigsaw Puzzle of Leonhard Euler, Swiss mathematician

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