But studies have shown that high-efficiency particulate air (HEPA) filters on most jets today can capture 99.97% of bacterial and virus-carrying particles.
但研究表明，如今大部分飞机上的高效微粒空气过滤器能够滤掉99.97%的细菌和病毒微粒。
The key point for high-density ESP design consists in: (1) capture of flue-gas dust in high efficiency, and (2) effective cleaning the dust captured on the electrode.
前言：高浓度电除尘器的设计关键在于：(1)高效捕集烟气中的粉尘；(2)有效清除捕集到电极上的粉尘。
So, reforming the smoke capture system and developing a high efficiency gas-collecting hood technology suitable to large-scale aluminum reduction cell become more and more particularly urgent.
因此，对现有集气系统进行改造，并研究开发一种适合大型铝电解槽的高效集气排烟技术就显得尤为迫切。
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