為什麽哪？

I am not saying I have pronounced this word right, I am just curious why this word is the most difficult? Care to elaborate?

所有跟帖： 

• 這個詞之所以難 -全國牙防組- ♂ (414 bytes) () 10/31/2011 postreply 12:04:15

• Thank you for the explanation :) -同學小薇- ♀ (0 bytes) () 10/31/2011 postreply 13:01:07

• 有道理，我以前發fast給那個fast的一樣，後來又發成first，現在也常常發成first。 -非文學青年- ♀ (0 bytes) () 10/31/2011 postreply 14:44:19