spiral
n. 螺旋形之物, 螺线 a. 螺旋形的, 盘旋的 vi. 螺旋形下降, 螺旋形上升, 螺旋形行进 vt. 使螺旋形行进
发音
词形变化
教材释义与例句
螺旋；旋涡；螺旋形之物
使成螺旋形；使作螺旋形上升
盘旋；成螺旋形；螺旋形上升（过去式spiraled/spiralled，过去分词spiraled/spiralled，现在分词spiraling/spiralling，第三人称单数spirals，副词spirally）
螺旋形的；盘旋的
释义与例句
-
1.
A curve that is the locus of a point that rotates about a fixed point while continuously increasing its distance from that point.
螺线
数学 -
2.
A helix.
螺旋
非正式 -
3.
A self-sustaining process with a lot of momentum involved, so it is difficult to accelerate or stop it at once.
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4.
A section of track that forms a circle and crosses over itself, used for gaining height in mountainous territory.
交通
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1.
To move along the path of a spiral or helix.
不及物The falling leaves spiralled down from the tree.
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2.
To cause something to spiral.
及物You need to learn how to spiral a ball.
-
3.
To increase continually.
比喻 不及物Her debts were spiralling out of control.
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1.
Helical, like a spiral.
词汇关系
相关短语
词源
From Middle French spirale, from Medieval Latin spiralis, from Latin spīra, from Ancient Greek σπεῖρα (speîra, “wreath, coil, twist”).
来源：wiktionary