Polyurethane membranes modified with silk fibroin protein(SF) and silk fibroin peptide(SP) had good flexibility. They could overcome rigid and brittle weaks of SF membrane.

用丝素蛋白或丝素肽表面改性的聚氨酯膜表现出良好的柔韧性，它能够克服丝素膜刚而脆的弱点；

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Taking an open membrane roof, which covers the central square of Great Shanghai Pedestrian Street in Zhengzhou City, as an example, a wind tunnel test on a rigid model was carried out.

以郑州大上海步行街中心广场膜结构屋盖为工程背景，进行了刚性模型的同步测压试验。

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Tensioned membrane structures is made of soft fabric and clenched by flexible cables or rigid supports to produce stiffness and cover a large space.

张力膜结构是一种以性能优良的柔性织物为材料，利用柔性钢索或刚性支承结构将膜面绷紧，从而具有一定刚度、能覆盖大空间的结构体系。

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Dietary fats and cholesterols build up there, making the membrane rigid and impeding the fluid movement of chemicals within it.

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