越来越多的美国成年人识字能力较低。
Twenty-eight percent of US adults find it difficult to compare and contrast information, paraphrase, or make low-level inferences, and, according to the PIAAC survey, have low literacy skills.
28%的美国成年人难以比较和对比信息、意译或做出低层次推断，且根据 PIAAC 调查，识字能力较低。
The survey defines literacy as “understanding, evaluating, using and engaging with written text to participate in the society, to achieve one's goals and to develop one's knowledge and potential.” All US PIAAC literacy results are for English literacy.
调查将识字定义为“理解、评估、使用和参与书面文本以参与社会，实现目标并发展知识和潜力”。所有美国 PIAAC 识字结果均针对英语素养。
The scores are based on the amount of points a respondent gets from completing tasks of increasing difficulty. The more tasks respondents can complete at a higher difficulty level, the higher literacy score they receive.
得分基于受访者完成难度递增任务所获得的分数。受访者在更高难度下完成的任务越多，所获得的识字分数就越高。
There are six levels of literacy in the PIAAC scoring system, ranging from below level one to level five.
PIAAC 评分系统共有六个识字等级，从一级以下到五级不等。
