| 释义 |
DEFINITIVE EXAMPLES 权威例句〔centering〕A temporary, usually wooden framework on which an arch, vault, or dome is supported during construction.定中心：在兴建拱门、拱顶或圆屋顶过程中所使用的暂时性支撑骨架，通常为木制美国传统〔spiral〕A curve on a plane that winds around a fixed center point at a continuously increasing or decreasing distance from the point.螺线：平面上逐渐远离或靠近一固定中心点时不断回旋的曲线美国传统〔tailstock〕The movable part of a lathe that supports the dead center.尾架：车床上支撑固定中心的活动部分美国传统 |