[O] emacs org mode publish to latex failed with strings like "__aaa_cc__"

[Xu Jingtao]

Hi all:

If I write some string like "__aaa_cc__" in org file,then publish it to pdf 
using latex,
it will failed and the output is wrong.

even I can use ~__aaa_cc__~, it's not a good way do it.

Can you fix it or I am wrong?
___________________________________
With Best Regards.
jingtao.