- And on some islands that is essential.
在某些岛上 这是必备的生存技能 - There are islands still forming today
由于火山运动 - built by volcanoes.
现在仍有岛屿不断形成 - Some erupt explosively.
有些火山喷发剧烈 - Others pour out rivers of molten rock.
有些则熔化岩石 - Lava.
化作岩浆 - In the last 50 years,
在近五十年内