spiral

The notebook was held together by a metal spiral that allowed the pages to turn easily.

(Chinese) 笔记本由金属螺旋环固定，这使得页面可以轻松翻转。

A staircase in the shape of a spiral can save a lot of space in a small house.

(Chinese) 螺旋形的楼梯可以为小房子节省大量空间。

If the government doesn't take action soon, the price of bread will spiral out of control.

(Chinese) 如果政府不尽快采取行动，面包价格将会急剧上涨而失去控制。

The autumn leaves began to spiral down from the trees and cover the garden path.

(Chinese) 秋天的落叶开始从树上螺旋式地飘落，覆盖了花园的小路。