有些是学习用的，有些是娱乐用的。
教科书是给学生学习用的，但是有时候它也成为了一种灵感。
Textbook is used for students to learn the knowledge, but sometimes it becomes the source of inspiration.
自从露托小姐建起了这套装置，有了学习用的照明，她十多岁孩子的学习成绩提高了。
Since Ms.Ruto hooked up the system, her teenagers' grades have improved because they have light for studying.
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