The combination of interior air quality and the technology of HVAC play an important role in the effective usage of environment and energy too.

室内环境品质与暖通空调技术的结合对于环境、能源的有效利用具有重要的意义。

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The effective usage on essence of international business arbitration demonstration law was helpful to recognition and execution of international sports arbitration.

对《国际商事仲裁示范法》精髓的有效运用将有助于国际体育仲裁裁决的承认与执行。

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The theoretical analysis and integrated data show that good environmental protection and economical benefit will result from generalization and effective usage of natural gas.

通过理论分析及数据归纳得出：如果能够推广和有效使用天然气，将在环境保护及经济上得到效益。

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Simple to use, and with a low-fuss factor, it has consistently high rates of usage - securing its place among the 10 most effective purchases.

BBC: NEWS | UK | Magazine | The economics of ice cream

Supplement these with diagnostic metrics such as number of downloads, repeat usage, social sharing, user reviews, and mentions in the press to help make the app more effective.

FORBES: Eight Rules for Building and Perfecting Mobile Apps