circular sectionˈsə:kjuləˈsekʃən短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 圆形断面,圆截面,圆裁面,圆弧形截面 Considering vessels have some curve, we solve the oscillatory fluid problems of a curved pipe with circular section by introducing a new coordinate system. 考虑到血管具有一定的弯曲度，本文引入了一种新的坐标系统，解决了弯管中的振荡流问题。 cnki