REQUEST TO THE TOKEN SERVICE for BING TRANSLATOR access token question

hi all,

 i got the same problem as the guy in

--http://social.msdn.microsoft.com/Forums/en-US/translator/thread/e99160c4-474a-4974-b585-ad4ddb7d6cb5?referrer=http://social.msdn.microsoft.com/Forums/en-US/translator/thread/e99160c4-474a-4974-b585-ad4ddb7d6cb5?referrer=http://social.msdn.microsoft.com/Forums/en-US/translator/thread/e99160c4-474a-4974-b585-ad4ddb7d6cb5---

but i confused by the answer, can anyone explain it in deails?

thanks in advance.