spiracular line

例句：

1. 1. The spiral staircase leads up to the rooftop.
   螺旋楼梯通向屋顶。
2. 2.The spiral galaxy is a fascinating example of cosmic structure.
   螺旋星系是宇宙结构的一个引人入胜的例子。
3. 3.The spiraling waves caused by the storm were terrifying.
   风暴引起的螺旋波浪令人恐惧。