| 释义 |
〔stratocumulus〕A low-lying cloud formation occurring in extensive horizontal layers with rounded summits.层积云:带有圆形顶峰的巨大的呈水平层次分布的低空云〔subgrade〕The level layer of rock or earth upon which the foundation of a road or railway is laid.路基,地基:在其上铺设路的基础或铁路道碴的岩石或泥土的水平层 |