名词
中文翻译：四边形
同义词：
['tetrahedron', 'tetrahedron']
例句：
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1.The shape of the tetragram is a square with four sides.
这个四边形的形状是一个有四条边的正方形。
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2. In mathematics, the tetragram is used to represent a regular tetrahedron.
在数学中，四边形用来表示一个正四面体。
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3. The tetragram is often used in geometry to illustrate the concept of symmetry.
四边形在几何学中常用来说明对称的概念。