To solve the urban rail transit noise problems is a comprehensive engineering system.
解决城市轨道交通噪声问题是一个综合的系统工程。
They are also quite useful in the analysis of noise problems, e. g. That of film grain noise.
它们对分析噪声问题(例如底片颗粒噪声)也是很有用的。
In fact, the quality of construction is steadily declining, and the noise problems are getting worse.
事实上,施工质量不断下降,噪音问题日益恶化。
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