| 词汇 | spiral |
| 词根词缀 | 词源： spiral (adj.) 1551, from M.Fr. spiral, from M.L. spiralis "winding, coiling" (1255), from L. spira "coil," from Gk. speira "coil, twist, wreath," from PIE *sper- "to turn, twist." The verb is attested from 1834; the fig. sense is from 1922. The noun is first recorded 1656; U.S. football sense is from 1896. Spiral galaxy first attested 1913. 词根记忆： a. 螺旋形的n.螺旋,螺线v.螺旋上升;盘旋A spring is a spiral.弹簧是螺旋形的物体. |
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