The birds circled in a slow spiral above the house.

鸟儿在房子上空缓缓盘旋。

《牛津词典》

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Analysts warn Turkey could be on the verge of again descending into a spiral of violence.

VOA: standard.2010.06.17

And very often what that does-- a positive emotion can take us out of this downward spiral and create an upward spiral.

很经常的是-,积极情绪把我们带出下行螺旋,形成一个上行螺旋。

哈佛公开课 - 幸福课课程节选

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

By raising expectations about pension incomes, Mr Darling may have given the spending spiral a further upward twist.

ECONOMIST: From richer to poorer

With this revenue lost, local services, at least those that survived the storms, could perish, a dangerous spiral for a rural town that has already seen much of its former population move to larger cities.

ECONOMIST: Dumas fends for itself

And so our credit could be downgraded, interest rates could go drastically up, and it could cause a whole new spiral into a second recession, or worse.

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