It is convenient for university students to borrow books from opening shelves to utilize documents and materials.But it is also becoming serious trouble of putting the books on the shelves messily.是什么意思_It is convenient for university students to borrow books from opening shelves to utilize documents and materials.But it is also becoming serious trouble of putting the books on the shelves messily.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句