pollution structure 污染结构
By analyzing its structure and working principle, it proves that the new circuit has little pollution to the network and has well characteristic of the output voltage.
通过简单分析该主电路的结构形式和工作原理，证明它是一种对电网污染少、整流输出电压特性好的焊接电源主电路形式。
The uncertainties come from synthetic action of input and output structure, investment of pollution control, environment policies, etc.
这种不确定性主要来自于经济的投入和产出结构、污染治理投入和环境政策等因素的综合作用结果。
Unoptimized energy structure and energy waste are among the major causes of severe air pollution.
不合理的能源结构以及能源的严重浪费则是造成我国大气污染严重的主要原因之一。
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