zhè / bù / kē / jiào / piàn / yòng / jiǎn / dān / de / dòng / huà / jiě / shì / le / huǒ / shān / shì / zěn / yàng / xíng / chéng / de / 。这部科教片用简单的动画解释了火山是怎样形成的。This popular science film explains how volcanoes form with simple animations.