慢速英语:Is a Flying Car in Your Future?

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commercial - adj. concerned with earning money

construction - n. the act or process of building something (such as a house or road)

drone - n. a type of small aircraft that flies without a pilot

start-up - n. a new business

rotor blade - n. a part of a machine that turns around a central point​

aviation ​- n. the business or practice of flying airplanes, helicopters, etc.

uncongested - adj. not full or crowded with something (such as vehicles or people)

recreational ​- adj. done for enjoyment

deposit - n. money that you give someone when you agree to buy something (such as a house or car)

fleet - n. a group of ships or vehicles that move or work together or that are controlled or owned by one company

destination - n. a place to which a person is going or something is being sent