How much
do you know about
volcano eruption
(火山喷发)?
————011219 李亮      
Part one：what is volcano?
Some words about volcano： active volcano 活火山  extinct volcano 死火山 volcanic ash 火山灰    reawaken 再度觉醒  
volcanologist 火山学家       rock-magma岩浆 crustal movement 地壳运动   lava flow 熔岩流  Volcanic Explosivity Index 火山暴发指数