随着航天事业的迅猛发展，大型柔性结构越来越多地使用在空间技术中。

With the development of astronautics, more and more flexible structures have been used into aerospace research.

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随着现代交通事业的飞速发展，特大型桥梁结构不断涌现，桥梁数量日益增多。

With the rapid development of modern transportation, plenty of super-large Bridges have been emerging and the number of old and new Bridges is constantly increasing.

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