Neptune ' s rings do not fall into this neat dichotomy ; their optical depth lies between the two extremes 但是这简单的二分法却无法适用于海王星的星环系统,因为其光深度恰位于两极端之间。
At the other extreme , the faintest known rings , such as jupiter ' s rings and saturn ' s outermost rings , have optical depths between 10 ? 8 and 10 ? 6 在另一个密度极小的极端情况当中,已知最模糊的行星环,如木星环与土星的最外环,其光深度只有10 - 8到10 - 6 。
光: light; ray深度: degree of depth; depth光深: optical depth露光深浅的: sensitometric目光深邃处: without emotion then pushes it from sight闪光深绿: limegreen无光深水区: aphotic zone感光深浅曲线: sensitometric curve深度: 1.(深浅程度) degree of depth; depth 河水的深度 the depth of the river; 通过疏浚保持河道的深度。 the depth of the river is maintained by dredging.2.(触及事物本质的程度) profundity; depth 一篇表现出思想深度的文章 an article that shows depth of thought; 她最近的那首诗极有深度。 her latest poem has remarkable depth.; 深度计 depthometer; 深度记录器 depth recorder; 深度指示器 depth indicator冰深度,深度: frost pinetration深度尺;深度规: depth ga(u)ge深度规;深度计: depth gauge深度计;深度规: depth gauge深度计深度: depthometer depth测深度: fathom场深度: depth of field灯深度: depth of modulation等深度: constant depth; even depth高度,深度: height,depth共深度: common depth古深度: palaeodepth涸深度: drying soundings结深度: junction depth进深 深度: depth净深度: clear depth