这样的系统能持续从室外引入新鲜空气更新室内空气，并且用排出的废气的热量加热引入的空气。
Such a system constantly refreshes your house with fresh air from outdoors but cleverly heats the incoming air with the warm, stale air that's being vented out.
当空气填料被允许而且是适当的时候，所引入的空气必须是洁净的、无油的、冷却的、干燥的压缩空气。
When air padding is allowed and appropriate, it is imperative that clean, oil-free, cooled, dry compressed air be introduced into the vapor space.
在清洁空气法案的推动下，这些企业将致力于引入“最佳技术解决方案”，以缓解温室气体排放问题。
These projects will be required under the Clean Air Act to employ "best available control technology" to curb GHG emissions.
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