求翻译：我们学校图书馆建于1979年10月5日，现有图书20万册。其中中文书籍16万册，外文书籍4万册，自然科学占75%，社会科学书籍占20%，其他书籍占5%。学校图书馆共有5个阅览室，其中学生3个，教师2个。室内有200多种报刊杂志可供师生们阅读，有工作人员4个，每天中午下午6点和星期六和星期日开放是什么意思？

Our school library was built in October 5th, 1979, 200,000 books available. Of which 160,000 Chinese books, foreign books 40000, 75% of natural science, social science books, 20%, 5% of other books. There are five school library reading room, including three students, teachers, 2. There are 200 kind

The library in our school sets up on October 5th in 1979, 200,000 volumes of existing book.Among them 160,000 volumes of Chinese book, 40,000 volumes of outside clerk's book, the natural science has 75%, the social science book has 20%, other books have 5%.The school library totally has 5 reading ro

Our school library constructed at October 5, 1979, existing books 200,000 volume.Chinese books 160,000 volume, the foreign language books 40,000 volume, the natural sciences account for 75%, the social sciences books account for 20%, other books account for 5%.The school library altogether has 5 rea

Our school library on October 5, 1979, 200,000 copies of existing books. Chinese books of which 160,000 volumes, 40,000 volumes of books in foreign languages, natural sciences, 75% social science book, 20% books in other 5%. School library there are 5 reading rooms, 3 for students, teachers 2. There

Our school library on October 5, 1979, 200,000 copies of existing books. Chinese books of which 160,000 volumes, 40,000 volumes of books in foreign languages, natural sciences, 75% social science book, 20% books in other 5%. School library there are 5 reading rooms, 3 for students, teachers 2. There