The American D in Pronunciation

The American D is when a T sound, like for example, better becomes better in our pronunciation because it's between two vowels. And they don't do this in British English or Australian English. So now for example, but it becomes but it, right? But if you add a pronoun with an H after it, like but her name is. Butter - that means butter on the bread. Exactly. This happens with some other sounds as well, but that's just a sample of what we cover in the power lessons.