标准美语发音的13个秘诀 CD 3 Track 12（在线收听）

Chapter 4. The American T     CD 3 Track 12 

The American T is influenced verystrongly by intonation and its position in a word or phrase. At the top of a staircase T is pronounced T as in Ted or Italian; a T in the middle of a staircase is pronounced as D [Beddy] [Idaly] ; whereas a T at the bottom of a staircase isn't pronounced at all [ho(t)]. Look at Italian and Italy in the examples below. The [tæl] of Italian is at the top of the staircase and is strong: Italian. The [də] of Italy is in the middle and is weak: Italy.