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 letters H-E-P-A represent the words High Efficiency Particulate air. HEPA filters capture almost all particles in the air that are zero point three microns in size or larger.
HEPA四个英文字母代表High Efficiency Particulate Air。高效微粒空气处理器能够捕捉到空气中几乎所有的微粒，即0.3毫米或者大一点的微粒。
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。
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