Hiking along the purling Lamar River, not far from a den of one of the wolf packs, Ripple walks by a small rise and parts a dense green curtain of booth willows to make a point.

沿著蜿蜒的拉马河步行，距离狼群巢穴的不远处，瑞波走过一个小山，秋华柳的枝叶垂织而成的丛密绿幕，告我们另一件事。

Nowadays, slop roof consists of steel column and beam or steel truss and purling, and connected with existed building by concrete beam cast in place, is being used commonly in this project.

前，在全国各地的“平改”中，普遍采用轻钢结构屋顶，由钢柱、钢梁或钢桁架及钢檩条构成，通过浇筑混凝土卧梁将新增轻钢屋顶与原有混凝土结构连接。