a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters
例句
用作名词 (n.)
The timber carries the whole weight of the roof. 栋梁支撑屋顶全重。
Turning my fluttering heart into a tree, let it stand firmly to welcome the baptism of time, being the paragon of mankind and the pillar of the nation. 化心旌为树,迎接时代的洗礼,坚毅地站着,为人类之灵长,为民族之栋梁。