And the design approach of widening bridge and culvert is studied and summarized.
分别对桥梁加宽和通道、涵洞加长的设计方法进行了研究、总结，并提出了设计程序。
Color optics and human color vision characteristics are studied and summarized at first in the dissertation.
本文首先对颜色光学以及人眼颜色视觉特性进行了综述性研究。
Meanwhile, on the roadway within the coal and gas outburst shock wave propagation characteristics are studied and summarized.
对巷道内煤与瓦斯突出冲击波的传播特性进行了研究和总结。
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