今天我们要学的词是 savanna. Savanna 名词，稀树草原。A comprehensive census shows that the savanna elephant population in 18 African countries decreased by nearly a third between 2007 and 2014. 一项综合全面的研究显示，18个非洲国家稀树草原非洲象的数量在2007到2014年间减少了将近三分之一。The reduction of the number of savanna elephants was largely due to illegal poaching for ivory. 非洲象数量的减少在很大程度上是由为获取象牙非法捕猎造成的。好的，我们今天学习的词是 savanna, savanna, savanna...