1、
Based on the analysis, determine the unicity of point of tangency and point of intersection.
基于在解析几何的基础上确定了切线和交点的唯一性.
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2、
G 1 means they are smoothly connected up to one differentiation , or are tangency continuous.
G1意味着两个对象光顺连接,一阶微分连续, 或者是相切连续的.
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