Objective To compare the effect of rodenticide and comprehensive control measure through investigating rodent density in urban community.

目的了解某城市社区的鼠密度情况，比较药物灭鼠和综合灭鼠措施的灭鼠效果，提出控制鼠密度的有效方法。

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Through understanding the principles of water strike, this paper advanced an effect measure to control the water strike to destroy valve and center pipe.

通过对水击规律的认识，提出控制水击压力破坏阀门、中心管的具体措施和有效方法。

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Sound barrier engineering is the effective measure to control the impact of railway noise, and acoustics design is the main ways and means to assure the effect of barrier.

声屏障工程是防治铁路噪声影响的有效措施，声学设计是保证声屏障工程降噪效果的重要手段和方法。

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