- spiral
 - ['spaiərəl]
 - n. 螺旋;旋涡;螺旋形之物
adj. 螺旋形的;盘旋的
vt. 使成螺旋形;使作螺旋形上升
vi. 盘旋;成螺旋形;螺旋形上升(过去式spiraled/spiralled,过去分词spiraled/spiralled,现在分词spiraling/spiralling,第三人称单数spirals,副词spirally) 
参考例子
           - 1.Costs have been spiralling all month.
 - 整个月以来费用在不断急剧地上涨着。
 
- 2.This is the exit of the museum. I like the spiral stairs.
 - 这是博物馆的出口。我个人非常喜欢这个螺旋形楼梯。
 
- 3.The principle of this method is to use Archimedes spiral to approaching ellipse.
 - 该方法的实质是用阿基米德螺旋线去逼近离散椭圆。
 
英文解释
           - n.
 - 1.a plane curve traced by a point circling about the center but at increasing distances from the cente
 - 2.a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
 - 3.ornament consisting of a curve on a plane that winds around a center with an increasing distance fro
 - 4.a structure consisting of something wound in a continuous series of loops
 - 5.flying downward in a helical path with a large radius
 
- v.
 - 1.to wind or move in a spiral course
 - 2.form a spiral
 - 3.move in a spiral or zigzag course
 
- adj.
 - 1.in the shape of a coil
 
网络释义
               - spiral
 - 螺旋; 螺线; 旋涡星系; 螺线,螺旋形;
 
- Tooth spiral
 - 齿螺旋线; 齿旋;
 
- logarithmic spiral
 - 对数螺线; 等角螺线; 对数螺旋线; 对数蜗线;
 
- dwarf spiral
 - 矮旋涡星系;
 
- spiral model
 - 螺旋模型; 螺旋模式;