surface roughness短语⁶⁷⁶³⁵ 基本例句 表面粗度,表面光洁度 Studying the air flow around soccer balls is a natural extension of McKeon's research, in which she and her colleagues study how surface roughness affects air flow, using spheres as test models. 研究足球周围的气流是麦凯恩课题的一个自然延伸——她和她的学生正在研究粗糙表面对气流的影响，而足球课作为球体的测试模型。 yeeyan