Labor dispatch not only plays a positive role, but also has negative effects.

劳动派遣既有其积极作用，也有其消极作用。

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Oral history plays a positive role in the study of Tsinghua University history.

口述史在推动清华大学校史研究方面起到了积极作用。

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In legal practice, this principle plays a positive role, but there are some problems.

在司法实践中，这项原则起到了积极的作用，但还存在着若干问题。

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"It is important that Syria plays a positive role in the region, " he told Syria's al-Watan newspaper, adding that peace in the Middle East "passes through" Syria and France.

BBC: Solve Iran peacefully urges Syria

Weather always plays a role in retail sales, positive or negative.

FORBES: Frankenstorm Puts Halloween Sales In Jeopardy

The Depression itself was portrayed as proof positive that markets are inherently unstable and that government plays a crucial and necessary role in preventing them from flying off the tracks.

FORBES: Magazine Article