最主要的是构造简单，比实体材料隔热屋顶降温效果好。
The mainest is tectonic and simple more adiabatic than hypostatic material housetop drops in temperature the effect is good.
采用分层优化方法并结合算例研究了实体材料模量相对比值、材料组分变化对优化结果的影响。
Influences of the elastic module ratio and the volume fraction of solid phases on optimal design are investigated.
当材料断裂，荚囊就会打开并释放出修复介体，介体变成实体的复合物填补裂缝从而恢复材料的特性。
When the polymer cracks, the capsules break open and release the healing agent, which becomes polymer solid and seals the crack and restores the material's properties.
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