宝典之一：连音
[url=http://b.tonxoo.com/upload/en/eeu/][/url]
宝典之三：变音
http://b.tonxoo.com/upload/en/eeu/宝典二.mp3
宝典之四：同化现象
http://b.tonxoo.com/upload/en/eeu/宝典三.mp3