With a telescope you can see the huge crater of Ve -suvius.用望远镜你能看到巨大的维苏威火山口。Mauna Loa awoke from a 25 year silence in July 1975, filling its summit - pit crater with lava.莫纳罗亚火山在1975年7月又从沉睡了25年的状态下苏醒过来了, 山顶上的火山口充满了熔岩.Gu...
When a large object impacts the Earth, it makes a crater.当巨大物体撞击地球时，就会产生凹坑。With a telescope you can see the huge crater of Ve - suvius.用望远镜你能看到巨大的维苏威火山口.Lava boiled up from the crater of the volcano.熔岩从火山口里滚滚喷出....
能源节约的理念产生于1973年的石油危机。Energy conservation as a philosophy was born out of the 1973 oil crisis.热产生于火.Heat proceeds from fire.问题正产生于此.That is where the problems begin....