论文部分内容阅读
采采蝇能传播锥虫病,导致人和动物生病和死亡。这是非洲撒哈拉沙漠南部贫困的主要根源之一,在世界其他任何地方都不存在这种生态因素。这里的因果关系很简
Tsetse flies can transmit trypanosomiasis, causing illness and death in humans and animals. This is one of the main causes of poverty in the southern Saharan Africa, which is not found anywhere else in the world. The causal relationship here is very simple