名词中文翻译
中文翻译：切线
同义词：
['perpendicular', 'line of tangency']
例句：
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1.The tangent to the circle is perpendicular to the diameter.
圆的切线与直径垂直。
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2. The tangent to the curve at point A is parallel to the x-axis.
曲线在点A处的切线平行于x轴。
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3.The tangent lines are used to measure the angles between two curves.
切线用于测量两个曲线之间的夹角。