主要分析了低架桥系统在不同工况下的模态，以及小车行走速度和低架桥垂直挠度之间的关系，并对低架桥系统进行了改进。

Meanwhile, this paper mainly describes the modes under various working conditions as well as the relationship between carriage movement speed and perpendicular deflection of truss bridge.

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然后是其他剩下来的：除了特定情况否则极少用到的低使用率单字，例如高架桥、牵强的、资格、丧失公权……等。

Then there's everything else: the low-frequency words that are rarely used except in very specific situations: overpass, far-fetched, competency, proscribe, etc.

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