“T” between two vowels is a fast “D”, T=D
T 处于两个元音之间时，听起来更像D音
city-cidy,
better-bedder
water-wader,
这也出现在两个单词之间， it is-id is.
I got(god）up at eleven oclock.
Do you want to get(ged) in or get(ged) out.
I bought (boughd) it(id) at a computer store.
What (whad) a nice day it (id) is?