曲率 qūlǜ curvature Origin Definitions Defs Strokes Stroke Words Sentences Sents 曲率向量 qūlǜxiàngliàng curvature vector 测地曲率 cèdìqūlǜ geodesic curvature 测地线曲率 cèdìxiànqūlǜ geodesic curvature 零曲率 língqūlǜ zero curvature (math.) zero curvature