VOA慢速英语:木星的卫星木卫二可能真的存在外星生命

geoscience – n. earth sciences, especially geology

habitable – adj. able to support life

interior – n. the inside part of something

potential – adj. having or showing the capacity to become or develop into something in the future

allow – v. to permit

hardy – adj. strong enough to deal with bad conditions or difficult situations