We rely on the Earth for everyting we need to survive, so let's take care of it.
我们依赖地球获取我们生存的一切东西,因此让我们来细心呵护它。
After switching on powerful arc lights, they saw great stalagmites -- some of them over forty feet high -- rising up like tree-trunks to meet the stalactites suspended from the roof.
他们打开强力弧光灯,看见一株株巨大的石笋,有的高达40英尺,像树干似地向上长着,与洞顶悬挂下来的钟乳石相接。