a book on the radio無線電入門（如果將on換成about,則是指壹本關於無線電的科普故事書）
stories about Micheal Jordan 邁克爾·喬丹的故事
He gave some advice on how to learn English. 就如何學好英語他給我提了壹些建議。
He wrote a book on politics. (他寫的書論述政治方面的問題)
He wrote a book about politics. (他寫的書講述有關
表示“關於”的介詞：of, about, on
(1) of僅指“關於”人或事物的存在，如：
He spoke of the film the other day.他前幾天提到了這部影片。
He thought of this matter yesterday.他昨天想到了這件事。
He thought about this matter yesterday.他昨天考慮了這件事。
(2) about指“關於”某人或某事物的較詳細的情況。
It’s a book for children about Africa and its people.
它是壹本供兒童閱讀的關於非洲和非洲人的書。
Can you tell me something about yourself? 妳能告訴我壹些關於妳自己的事情嗎？
(3) on是指“關於”學術性的或嚴肅的，供專門研究用的。
It’s a textbook on the history of China.它是壹本有關中國歷史的教科書。