一事物或以其新或以其重要或以其有生命力或以其是普遍性存在或以其是必然性存在，迟或早会成为所有人或特定阶层人或特定人生阶段的人所关注的“焦点”。这个规律性现象对图书馆的工作十分重要。我们面对的是不同性别不同年龄阶段意欲掌握新的、重要的、有生命力的、根本性的? A thing or a person whose interest, whether new or important in its vitality, or its pervasiveness or its existence as a necessity or not, is, sooner or later, to become owner or a particular class or stage of life, focus". This regularity is very important to the work of the library. We are faced with different age groups of different ages want to grasp the new, important, vitality, fundamental?