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Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations,and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments.
出自-2010年6月阅读原文
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airplanes will increasingly become the chief means of transportation, according to a professor.
2019年12月四级真题（第一套）阅读 Section B
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Although in-flight infections thrive in dry environments like airplanes, your risk of getting sick from an airplane is actually low because of the air filters used.
2019年12月四级真题（第三套）阅读 Section A
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That is the conclusion of a new study that looked at how respiratory viruses spread on airplanes.
2019年12月四级真题（第一套）阅读 Section A