基本解释n.栋梁；屋顶同根派生 rooftree相关词英汉例句if as a tree, Im going to be the rooftree; 既然是树，我就要长成栋梁；rooftree更多例句词组短语短语housetop roof rooftop rooftree 屋顶rooftree更多词组英英字典柯林斯英英字典 &rarranother name for ridgepole rooftree剑桥字典rooftree柯林斯字典专业释义土木建筑工程椽木架子