慢速英语:为什么在健康危机期间有些飞机会人满为患？

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contagion –n. a disease that can be passed from one person to another by touching

pandemic –n. the fast spread of a disease to many people over a large geographical area

departure –n. the process of leaving a place to go on a trip

scheduled –adj. planed ahead of time

hub –n. an airport through which an airline sends most of its flights

aisle –n. a space to walk between rows of seats

cabin –n. the area in a passenger airplane where the passengers stay

filter –n. a device that removes unwanted substances from gasses like air or liquids like water