Based on this, test was made on low carbon source urban wastewater treatment in Guangzhou region by using SBR process to investigate the effect and affecting factors of biological phosphorus removal.
碳、氮、磷比例失调（碳量偏低）城市污水的脱氮除磷一直是个难题，为此采用SBR法处理广州地区低碳城市污水，研究了生物除磷效果及其影响因素。
Based on experiment study, several factors are analyzed in the design of infrared gas sensor in which infrared LED is used as light source, and four schemes are compared in this paper.
在实验研究的基础上分析了采用红外发光二极管为光源的气体传感器在设计中应考虑的几个因素。
Based on the characteristics of discovered oil and gas distribution, those sags are controlled by such factors as hydrocarbon source center, deep and large faults and structural belts.
从已发现油气分布特点看，主要受生烃中心、深大断裂以及构造带等因素控制。
Firstly, based on the preliminary evaluation for environment of dangerous source at the prospecting stage, the risk factors effect and construction of risk reduction can be determinated.
首先，据勘察资料对隧道突涌水的孕险环境进行初步评价，以确定隧道不同区段降低致险因子影响度的施工对策；
Firstly, based on the preliminary evaluation for environment of dangerous source at the prospecting stage, the risk factors effect and construction of risk reduction can be determinated.
首先，据勘察资料对隧道突涌水的孕险环境进行初步评价，以确定隧道不同区段降低致险因子影响度的施工对策；
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