what is the difference between"about"and "on" when they are

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what is the difference between"about"and "on" when they are used for the meaning of "关于"
当about和on都解释成"关于"的时候,它们的用法有什么区别吗?请举例说明一下!

ON is used to suggest that a book, article, lecture etc is serious or academic, suitable for specialists.
ABOUT is usual when the information given is more general, or the style of communication is more casual.
A book ABOUT Asia is a book for the general public, whereas a book ON Asia is one for scholars.
Compare:
a book ON African history
a book for children ABOUT Africa and its people
a lecture on economics
a conversation about money
an article on British indutrial problems
an argument about strikes

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