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出典:Wiktionary
The Necker cube was first published as a rhomboid in 1832 by Louis Albert Necker.
Necker cube (複数形 Necker cubes)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/14 11:09 UTC 版)
The Necker Cube is an optical illusion first published as a rhomboid in 1832 by Swiss crystallographer Louis Albert Necker.
Necker cube