The investigations and measurements on social activity noise in a central district of Hangzhou are taken for a year.

对杭州市中心城区的社会生活噪声进行了为期一年的分类调查和监测。

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The investigations and measurements on social activity noise in a central district of Hangzhou are taken for a year.

对杭州市中心城区的社会生活噪声进行了为期一年的分类调查和监测。

youdao