visceral-fat
发表于 2025-3-28 16:54:08
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爱好
发表于 2025-3-28 21:15:28
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手段
发表于 2025-3-29 00:08:37
Platonic and Archimedian Solids,A . is a three-dimensional figure bounded by a finite number of polygonal faces. Its literal meaning is a many-faced figure because . means many and . means face. Thus a tetrahedron is a four-faced figure, which can only be the triangular pyramid. The plural form of polyhedron is polyhedra. Some human beings are bihedra.
业余爱好者
发表于 2025-3-29 03:30:22
978-3-030-90379-4The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerl