| 释义 |
〔bridgeboard〕A notched board at either side of a staircase that supports the treads and risers.木楼梯侧板，木楼梯小梁：在阶梯两边支撑楼梯的踏板和竖板的有凹口的木板〔rise〕The height of a flight of stairs or of a single riser.级高：一段楼梯或一单块楼梯竖板的高度〔riser〕The vertical part of a stair step.楼梯的踏步竖板：楼梯的竖直部分 |