VOA慢速英语:Scientists Explore Underwater Volcanoes

exclusive –adj. not available anywhere else

habitat –n. a kind of place where certain kinds of animals and plants live and grow

marine –adj. having to do with the sea

virtually –adv. through digital technology rather than physically

encrusted –adj. covered, overgrown

crater –n. a round hole at the top of a volcano or caused by the impact of a meteorite