名词
中文翻译：五元体
同义词：
['pentagonal', 'pentamer']
例句：
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1.The pentagon is a shape with five equilateral triangles.
五边形是一种有五个等边三角形的形状。
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2.The pentagon has five sides and five angles.
五边形有五个边和五个角。
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3. The pentagon is used in many sports to measure distance.
五边形在许多运动中用于测量距离。