The green spiral is made from quarter-circles tangent to the interior of each square, while the red spiral is a Golden spiral, a special type of logarithmic spiral.

绿色螺旋线由内部每一个正方形和四分之一圆相切线构成，而红色的螺旋线是黄金螺旋线，它是对数螺旋线的一种特殊类型。

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Some scientists worry that Arctic sea ice may be going from a downward spiral to a "death spiral," one from which there is no escape even if we can manage to reduce carbon emissions.

一些科学家担心北冰洋的冰面会成螺旋式下降，进入“死亡螺旋”- - - - -即使我们成功减少碳排放量，也无法改变现在的情况。

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For higher inflation to become dangerous a wage-price spiral is required, and without higher wages, there is no spiral.

要让上升的通货膨胀变得危险就需要产生工资-价格的盘旋上升，如果工资不上涨，就没有盘旋上升的余地。

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The new information also adds to astronomers' understanding of our galaxy's spiral arms.

VOA: special.2009.01.20

Vertically means that every class connected to the next class is connected to every class throughout the semester around a spiral.

纵向意味着每一节课都和下一节课有关系,和整个学期内的每一节课都有关系，呈一个螺旋状。

哈佛公开课 - 幸福课课程节选

It's an opportunity to deal with those perhaps in a more constructive way, than letting the feeling spiral.

也许可以借这个机会用更有建设性,的方法应对，而不是使负面情绪恶化。

普林斯顿公开课 - 人性课程节选

It points out that while old age does bring with it challenges, it does not necessarily need to spell a downward spiral to infirmity.

BBC: Why old age need not be a burden

Injecting money into the economy in 2009 will allow the country to return to growth more quickly than if we let the market continue to spiral downwards, which would lead to even greater budget deficits in the longer term.

BBC: Call for new ?20bn economy boost

The engineers ultimately decided to attach two of the spiral beams to each beetle's thorax.

BBC: Cyborg search-and-rescue insects' power source unveiled