In production, the main difficulty is the manufacture of the evaporator spiral wall especially it's transition section.

此锅炉制造中最大的难点在于螺旋水冷壁，特别是其中过渡段的制造。

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Picking your way down a spiral staircase at Brompton Road, your hand runs over art-nouveau wall tiles in green, cream and brown.

当你沿着布朗普顿路地铁站螺旋状的楼梯拾阶而下，你的手轻轻拂过的是绿色、雪白、棕褐色的新艺术风格的墙砖。

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She was pointing at an enormous, gray spiral horn, not unlike that of a unicorn, which had been mounted on the wall, protruding several feet into the room.

她指着一只巨大的灰色螺旋形兽角，与独角兽的有些相似，它安在墙上，伸进房间几英尺。

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Prominent economists have drawn an eerie parallel between today's events and those of the early 1930s when, as the world limped in the aftermath of the 1929 Wall Street crash, a banking crisis in Europe took the world economy into another downward spiral and led to an explosion of extremist politics that, ultimately, set the pathway to World War II.

CNN: What happens to your money during Eurogeddon?