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When I explained that I wasn 't a dropout , I just hadn 't gone to school , she looked even more scornful .

当我说我不是一个中途退学的学生，我只是从来没有上过学时，她的眼神更是充满嘲讽。

What is clear is the result : education experts say that at many universities , half or more of north korean defectors are dropping out , though the problem is so new that complete statistics do not exist . ( The dropout rate among south koreans is just 4.5 percent . )

后果很明显：教育专家说，尽管这是一个新问题，尚未有完整的数据，但在很多高校，有一半以上的朝鲜逃北者辍学，而韩国学生的退学率只有4.5%。

Other weaknesses include the study 's small size and high dropout rate .

其它不足包括研究规模小，退出率高。

Bill gates : I was harvard 's most successful dropout .

比尔盖茨：我是哈佛最成功的辍学生。

Dropout rates are not high for middle-class white children , but they are very high for black and hispanic children living in poor neighborhoods .

中产阶级白人家庭的青少年辍学率较低，但生活在贫困社区的黑人和拉美裔青少年辍学率非常高。