Various sources of indoor air pollution and complicated affecting elements result in serious damage to human health.

室内环境污染的种类繁多，污染源广泛，影响因素较为复杂，因此对人体健康造成的危害更为严重。

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The paper focuses on analyzing the contents of business cost, affecting elements and main approaches to reduce business cost.

本文着重阐述了商务成本的内涵、影响因素及降低商务成本的主要途径。

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There is clearly changed on yield strength and ratio of yield and tensile strength and the main affecting elements is middle frequency heating temperature before coating.

管体屈服强度和屈强比有明显变化，其主要影响因素是防腐前的中频加热温度。

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Other elements affecting share are transaction prices, marketing spend, and propensity to make share-enhancing, low-profit sales to daily rental fleets.

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