VOA慢速英语:研究称闪电可能有助于地球上生命的发展

dissolve – v. to turn from a solid into a liquid

meteorite – n. a piece of rock or metal that has fallen to the ground from outer space: a meteor that reaches the surface of the Earth without burning up entirely

quintillion – n. a number equal to 1 followed by 18 zeros

fossil – v. part of an animal or plant from thousands of year ago, preserved in rock

emerge – v. to appear from somewhere

source – n. something that provides what is wanted or needed

shallow – adj. not deep

impact – n. an act or event in which something strikes another thing

decade – n. a period of 10 years