By using the mechanics theory to analyze the character of roof moving and deformation after coal mining, the conclusion is gotten that the basic roof will not fail.
并运用相关的力学理论，分析置换开采后顶板的运动和变形特征，得出基本顶不会破断，地表变形没有超过建筑物允许变形范围。
Even in the 70s we had a basic solar water system on the roof, and grew fruit and vegetables.
即便在70年代，我们就在屋顶安装了一套基础的太阳能热水系统，并种上果树和蔬菜。
Slums should be turned into livable places where residents have the opportunity to build a "decent roof over their head" and basic amenities like water and sanitation, she says.
贫民区应该被改造成宜居的地方，使居民有机会为自己建造一个体面的安身场所，并获得供水和卫生服务，她说。
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