VOA慢速英语:日本公司成功进行空中飞车测试

modest –adj. not large or complicated

propeller –n. a device with two or more blades that turns very quickly causing ships or aircraft to move

vertical –adj. positioned up and down

traffic jam –n. a situation where many cars are on the road but they cannot pass because traffic is blocked or slow

battery –n. a device that stores electrical charge

commercial –adj. related to or used in the buying and selling of goods

aviation – n. the flying or operation of an aircraft

adoption –n. to accept something