单词：generatrix
magnitude, which, by its motion, generates another magnitude, as a
line, surface, or solid; -- called also describent.
generatrix的用法和样例：
例句
- We need to consider the deformation of only one strip parallel to generatrix of the cylinder.我们只需要考虑一个平行于圆柱母线的窄条的变形。
- Formula to evaluate translation of the tooth-surface and the equation to describe the generatrix of the negatively cambered sooth-surface were derived, respectively.分别推导得到齿面平移距离和内凹齿面母线方程的计算公式。
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