名词
中文翻译：切线
同义词：
['straight line', 'perpendicular line', 'line of intersection']
例句：
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1. The car's length of tangent line is 20 meters.
这辆车的切线长度是20米。
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2. The teacher drew a line of tangent on the blackboard to help us understand the problem.
老师在黑板上画了一条切线来帮助我们理解这个问题。
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3.The line of tangent intersects the x-axis at point A.
切线与x轴相交于点A。