由于毛里塔尼亚沙漠地区缺乏校舍、交通不便、书本奇缺,那里的游牧民子女学习条件很差。于是,树下学校便应运而生。在遮阳消暑的大树下,教师用一块巨大的干树皮作“黑板”,学生则用干树皮作纸来写字、做作业。这种可用来书写的干树皮被修饰得很好看,也用来为牧民间传递信息。 Due to the lack of school buildings in the Mauritania desert, inaccessibility to transportation, and the scarcity of books, the children of nomads have poor learning conditions. Thus, under the tree school came into being. Under the sun-warming trees, teachers use a huge bark of dried bark as a “blackboard.” Students use dry bark for writing and doing homework. This kind of dry bark, which can be used for writing, is decorated very well and is also used to convey information for pastoral folks.