玄武岩是最普通的火山岩.Basalt is the commonest volcanic rock.需要用玄武岩来铺设路面或修防洪堤.Basalt is needed to surface a road or to build a break water.所有的迹象只表明海洋地壳处都是玄武岩质的,组成也比较稳定.All indications are that it is everywhere basaltic and relative...
Namibian law permits ranchers to shoot cheetahs to protect their livestock...纳米比亚法律允许农场主射杀猎豹以保护家畜。Many of the ranchers themselves see all this tourism as a cheeky attempt to commercialise a real and vanishing culture.在很多...