But outcomes are poor. Over half of those who finish school are functionally illiterate.

但结果很糟糕。其中超过一半的毕业生是功能性文盲。

One study estimates that some 30 million adult Americans are " functionally illiterate" and cannot read or write well enough to answer the want ad or understand the instructions on a medicine bottle.

一项研究估计，大约有 3000 万成年美国人是“功能性文盲”，他们的读写能力不足以回答招聘广告或理解药瓶上的说明。