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lkys(金币+30, 翻译EPI+1):鼓励应助，译文还不是我真正想要的。 2010-08-30 12:47:14
这样子：）
structure design of the civil air defence, which requires the ability of carrying the instantaneous, and usually one-off load with large but unstable value, is not very similar to the ordinary construction designing for civil use. As a matter of fact, the designing, when obtained appropriate collapse resistance and necessary maintenance function, can have a fairly slack property restrict like a lower level of safety and bearing capacity, a higher designing material strength, a plastic yielding condition under designing load, or some major deformation, crack, even local failure. So the civil air defence requires the building materials to be of high strength, ductility,energy dissipation as well as impact &shock resistance. |
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