The combined structures which are made of bar, beam, membrane, plate and shell elements are used broadly in engineering.

杆、梁、膜以及板壳等多单元组合结构被广泛地应用到工程实际当中。

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In the cryostat section, the antigens also appeared at the fourth week, they were localized on vitelline membrane and egg shell.

冰冻切片的抗原也在第四周开始出现，定位在卵黄膜及卵壳上。

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The material of the membrane module shell is also an important factor.

膜器件的外壳材料对强化效果也有较大影响。

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We also learn to eat the connective tissue between shell and mollusc, la membrane, an extra little treat like a mini scallop.

BBC: Postcard from Etang de Thau, France