A government study recommended a national highway system of 33,920 miles, and Congress passed the Federal-Aid Highway Act of 1944, which called for strict, centrally-controlled design criteria.
一项政府研究建议建设一个33,920英里的全国公路系统，国会通过了1944年的《联邦援助公路法案》，该法案要求制定严格的、集中管控的设计标准。
To introduce the design method, composition and main study content of "Aid-decision System of Heavy Machine Gun System of Approval Test".
介绍了重机枪系统定型试验辅助决策系统的设计方法、组成和主要研究内容；
Some new experiments with the aid of computer are designed to study the relationship between color channel and figure channel in human visual system.
利用计算机设计新的实验，研究了人类视觉系统的颜色、形状通道和识别颜色的时间。
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