On most commercial planes, at least half of the air comes from outside the aircraft and passes through a high-efficiency particulate air, or HEPA, filter which removes contaminants.

 
  • 在多數商用飛機上,至少有一半空氣是來(lái)自于飛機外部,而且都經(jīng)過(guò)了一種高效空氣凈化裝置的過(guò)濾。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan