Due to resource scarcity and the lack of external support, the underlying expression become into the main form of the disadvantaged groups' interests expression.
由于资源的匮乏和外部支持的缺失，底层表达成为弱势群体利益表达的主要方式。
Middle water reuse is important to save water resource due to scarcity of water resource in Shenzhen city.
深圳市水资源严重短缺，中水回用对于节约水资源有着重要的意义。
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