本文主要对城市噪声的产生源进行了分析，对噪声给人群造成的危害进行了初步探讨，提出了城市噪声的控制对策。
In this paper, the emergence of urban noise sources is analyzed, noise pollution hazards on the crowds causes to a preliminary study, and the urban noise control measures are proposed.
本文初步探讨了无公害蔬菜种植生产基地的环境评价体系，分析了基地污染因素的来源和对蔬菜造成的危害。
The environmental evaluation system of non-hazardous vegetable bases are discussed, the sources of pollution factors of production bases and harms on vegetables are analyzed.
本文深入分析了震源车的振动、噪声产生的根源及其危害性，初步探讨了一些降低噪声及振动的措施。
This article analyzes the source and damage of the noise and vibrating of vibra-tor. It also proposes some measures to reduce noise and vibrating.
本文深入分析了震源车的振动、噪声产生的根源及其危害性，初步探讨了一些降低噪声及振动的措施。
This article analyzes the source and damage of the noise and vibrating of vibra-tor. It also proposes some measures to reduce noise and vibrating.
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