名词
中文翻译：Unknown
同义词：
['basic curve', 'fundamental line', 'basic curve', 'fundamental line']
例句：
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1. The fundamental curve of the planet is its elliptical shape.
行星的基本曲线是其椭圆形状。
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2. The fundamental curve of a parabola is its vertical axis.
抛物线的基本曲线是其垂直轴。
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3. The fundamental curve of a circle is its straight edge.
圆的基本曲线是其直边。