spiral /ˈspaiərəl/ I. n. ［c］螺旋：an inflation spiral 螺旋式通货膨胀 The rocket went up in a spiral.火箭旋转着上升。‖II. adj.螺旋的：a spiral staircase 螺旋式楼梯 ‖III. vi. (spiralled, spiralling) 1.盘旋上升(或下降)：The smoke spiralled up. 烟盘旋上升。The damaged plane spiralled down. 被击伤的飞机盘旋下落。 2.(物价等)不断急剧地上升(或下降)：Prices have spiralled in the last six months. 在过去的半年里物价不断上升。