spiral
spiral 英 [ˈspaɪrəl] 美 [ˈspaɪrəl]
n. 螺旋；螺旋式 adj. 螺旋式的；盘旋的 v. 螺旋式上升（或下降），盘旋
进行时:spiralling 过去式:spiralled 过去分词:spiralled 第三人称单数:spirals 名词复数:spirals
- A spiral is a coil or curl, like the shape of a piece of hair wound around your finger, a Slinky toy, or a corkscrew.
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- n. 螺旋；螺旋式
- adj. 螺旋式的；盘旋的
- v. 螺旋式上升（或下降），盘旋
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1. The birds circled in a slow spiral above the house.
鸟儿在房子上空缓缓盘旋。
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2. measures to control the inflationary spiral
控制日益恶化的通货膨胀的措施
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3. the upward spiralof sales, the downward spiralof sales
日渐上升╱下降的销售额
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4. A snail's shell is spiral in form.
蜗牛壳呈螺旋形。
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5. The plane spiralled down to the ground.
飞机盘旋降落。
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6. the spiralling cost of health care
急剧上涨的医疗费用
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7. Prices are spiralling out of control.
物价飞涨，失去控制。
- spiral (adj.) 1550s, from Middle French spiral (16c.), from Medieval Latin spiralis "winding around a fixed center, coiling" (mid-13c.), from Latin spira "a coil, fold, twist, spiral," from Greek speira "a winding, a coil, twist, wreath, anything wound or coiled," from PIE *sper-ya-, from base *sper- (2) "to turn, twist." Related: Spirally. Spiral galaxy first attested 1913.
- spiral (n.) 1650s, from spiral (adj.). U.S. football sense is from 1896. Figurative sense of "progressive movement in one direction" is by 1897. Of books, spiral-bound (adj.) is from 1937.
- spiral (v.) 1726 (implied in spiraled), transitive, from spiral (n.). Intransitive use by 1834. Transferred and figurative sense by 1922. Related: Spiraling.
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