[OS X TeX] Package inputenc warning: Error: Keyboard character used is undefined

[Kuo-Hsien Chang]

Dear all,

I google this question and then some solutions did not solve my  
questions.

I'm using TexShop under a Mac O.S. X

The error showed in the TeXShop as below.

Package inputenc warning: Error: Keyboard character used is undefined
(inputenc)    in inputencoding 'utf8'.

:
:
l.85 ... site range in the past 100 years from ^^B
                                          8.2 degree C in January to...

Thanks for your help and solution.

Michael
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