铁制锄头使土地更高产，铁制武器使战士更强大，它们在许多非洲西部的部落中都拥有象征性意义。
Iron hoes, which made the land more productive, and iron weapons, which made the warrior more powerful, had symbolic meaning in a number of West Africa societies.
下图显示了艾滋病在非洲南部、西部和东部三个城市的不同传播模式。
The graph below shows how differently the epidemic has evolved in three cities in southern, western and eastern Africa.
部落一般在中部和西部非洲的密林这些植被丰富的地方，找寻适合自己的食物：他们吃植物的根，竹笋，水果，野生芹菜，树皮和果肉。
In the thick forests of central and west Africa, troops find plentiful food for their vegetarian diet. They eat roots, shoots, fruit, wild celery, and tree bark and pulp.
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