老师用粉笔在黑板上画了一张亚洲地图。
如下面地图显示，征兵在亚洲和非洲最为普遍。
As the map below shows, conscription is most popular in Asia and Africa.
这种地图通常被叫做“丁”字形地图，因为这些地图上只表明了三大洲--欧洲、亚洲和非洲--的情况，这三大洲被地中海和尼罗河所形成的“丁”字隔开了。
These maps are often called "T" Maps because they show only three continents - Europe, Asia and Africa - separated by the "T" formed by the Mediterranean Sea and the River Nile.
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