I had several children and books were our main source of entertainment.
我有几个孩子，书是我们的主要娱乐来源。
People can have the main idea of the books, knowing what the authors have written.
人们可以对书本有大致的了解，知道作者写了什么。
Internet and books were the main way for the college students to understand AIDS knowledge.
互联网和书籍是大学生获取艾滋病知识的最主要途径。
Internet and books were the main way for the college students to understand AIDS knowledge.
互联网和书籍是大学生获取艾滋病知识的最主要途径。
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