These strands of molecules twine around each other to form cable-like structures.这些分子链彼此缠绕，形成缆线状的结构。There are wide variations caused by different academic programme structures.不同的教学项目结构造成了巨大的差异。Family structures are weak...
Overlong rectangular - ambulatory - plane RC frame structures are widely used in public buildings.回字形超长钢筋混凝土框架结构在我国公共建筑中有着广阔的应用前景.This hierarchical , project - by - project, view clarifies the symbolic structures within ...