We implemented pollutant emission trading in full operation, building sub-centers of pollutant emission trading in every county, city and district.

全面实施排污权交易，各县(市、区)均建立排污权交易分中心。

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Comparing travelers from centers of communities and from suburbs, it is clear that trip-makers in urban centers and sub-centers are more likely to travel by public transportation.

相对于组团中心和非中心区的出行者，城市中心和城市副中心的出行者选择公共交通的可能性更高。

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The investigation on Angela McRobbie explored by Chinese researchers mainly centers on her feminism and theory of youth sub-culture, and hasn't touched on her postfeminism.

国内对麦克罗比的研究多集中在她的女性主义、青年亚文化理论方面，尚没有对其后女性主义理论展开研究。

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Supply chains have evolved into a network of hundreds of suppliers, sub-contractors and distribution centers, adding tremendous complexity.

FORBES: Ash In The Supply Chain

The retail sector REITs consist of three sub-sectors, including shopping centers, regional malls and free-standing (or triple-net).

FORBES: Move up http://i.forbesimg.com t Move down

Tesla is allowed to sub-contract service and repair work to in-state service centers, but even those requests are routed through California, which takes longer and is vastly more complicated.

FORBES: Elon Musk Rallies Employees To Take On Texas Auto Dealers