Therefore systematic study on environmental influence by electromagnetic radiation has both important academic meaning and engineering value.
因此，电磁辐射对环境影响的研究具有非常重要的工程应用价值和学术意义。
Environmental protection is a complicated and systematic social engineering which needs the efforts of all parties, so public participation is an indispensable link.
环境保护是一项复杂的社会系统工程，需要各方共同努力，公众参与是其中不可或缺的一个重要环节。
Environmental protection is a complicated and systematic social engineering which needs the efforts of all parties, so public participation is an indispensable link.
环境保护是一项复杂的社会系统工程，需要各方共同努力，公众参与是其中不可或缺的一个重要环节。
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