spiral

螺旋形之物, 螺线

a plane curve traced by a point circling about the center but at increasing distances from the center; a continuously accelerating change in the economy; ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center; flying downward in a helical path with a large radius

螺旋形的, 盘旋的

螺旋形下降, 螺旋形上升, 螺旋形行进

使螺旋形行进