VOA慢速英语:科学家称月球上的水比我们想象的要多

generate – v. to produce something or to cause it to be produced

asteroid – n. objects made of rock and metal which orbit the sun, but are smaller than planets

detect – v. to discover or noticed the presence of something

vastly – adv. to a very great extend in an extremely large way

accessible – adj. able to be reached or to be used

opportunity – n. a period of time or situation when something can be done