看來是韋氏錯了。

以下是從一網站摘來的：
I, and everyone else I know, pronounce hot and dog with different vowel sounds. This includes people from Indiana, Wisconsin, and Michigan.

Hot I pronounce with the ah sound, and dog with the aw sound. Now people from the East Coast and in areas of Canada, pronounce hot and many other words with more of the aw sound.

結論是，東岸的一些人發HOT用not裏的O，其他地方用“啊”。

所有跟帖： 

• 同意這看法. 就是各地口音不同.不必過分考究 -suvescape- ♂ (0 bytes) () 10/20/2009 postreply 20:52:17

• 我在加拿大讀ESL的時候,老師特別交代不要用韋氏字典,要用longman! -suvescape- ♂ (223 bytes) () 10/21/2009 postreply 11:16:18