Despite the litany of problems, the 48 countries of sub-Saharan Africa (hereafter referred to as plain Africa) are, by several measures, enjoying a period of unparalleled economic success.
尽管非洲国家长期出现问题，但非洲撒哈拉地带的48个国家（后文简称为非洲）以各种不同的标准来衡量，他们都获得了空前的经济成功。
Buffalo, zebras, wildebeests, topi, and Thomson's gazelles live in huge groups that together make up some 90 percent of the total weight of mammals living on the Serengeti Plain of East Africa.
野牛，斑马，角马，转东非食草动物的食性角牛羚和汤氏羚这些群居动物占据了非洲东部塞伦盖蒂平原的总哺乳动物的数量的90%。
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