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本文（第 1 部分）介绍了 Webzine 这个简单 PHP应用程序的第一部分，并详细分析了几小段代码示例。

Part 1 of this article presents the first part of a simple PHP Webzine application. I've covered a few small code examples in detail.

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针对工程实践中常见的桥梁问题，建立了其在自由振动下的模型，分析了其前几阶振动模态下的振形和动态应变分布。

Aimed at popular bridge in the engineering, we build a piezoelectric bridge vibration model and analyze the vibration shape and distribution of the dynamic strain.

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