Starting with analysis of the status and characteristics of no—flow in the lower Yellow River, the causes, the consequent influences and the alleviating measures are studied in the paper.
本文从分析黄河下游断流的现状和特点入手，重点研究了黄河断流的成因、造成的影响以及缓解断流的对策。
Based on the analysis of the characteristics of traffic flow under crowded road, an improved models of parking wave and starting wave were used to calculate queuing length and queuing duration.
在分析道路堵塞时交通流特性的基础上，基于改进的停车波与启动波模型，推导出道路堵塞时车辆排队长度和排队持续时间的计算模型，并用实际例子对该方法的有效性进行验证。
Starting with the characteristics and functions of news leads and the analysis of cases, the author elaborates on the writing demands, translation skills and typical problems of news leads.
从新闻导语的特点及功用入手，以实例为证，论述了新闻导语的写作要求、翻译技巧，以及应注意的问题。
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