某些站点，例如Healia，只提供适合“初级读者”程度的用户阅读的结果。
Some sites, such as Healia, can limit results to those written at a “basic reading” level.
参加考试的人中几乎有一半没能解出初级的数学试题，三分之一未能通过阅读理解测试。
Almost half of those who sat the exam were unable to solve elementary maths questions and a third failed a reading comprehension test.
它们面向大众，而不是专家教授。阅读高级教科书，必须先读初级课本。
To read a textbook for advanced students, you have to read an elementary textbook first.
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