Research has been undertaken using secondary and primary data collection methods.

使用二级和初级数据收集方法进行了研究。

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Face-to-face surveys and neighborhood audits were the two primary methods of data collection.

面对面调查和邻里审计是两个主要的数据收集方法。

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Face-to-face surveys and neighborhood audits were the two primary methods of data collection.

面对面调查和邻里审计是两个主要的数据收集方法。

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