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.
名著探讨的是一切问题的基本道理；从这一意义上说，它们可视为初级课本。
But the great books can be considered elementary in the sense that they treat the elements of any subject matter.
小心阴沟里翻船，初级的课本很可能出现一些要命的生字。
Be careful, sometimes you may see some difficult words in Elementary level textbook.
小心阴沟里翻船，初级的课本很可能出现一些要命的生字。
Be careful, sometimes you may see some difficult words in Elementary level textbook.
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