Good. ddd-- My tongue is lifted into position for the D, and my vocal cords make a sound.

我的舌头往上抬到念「D」的位置，然後我的声带发出声音。

Good about, good about. Goo-- ddd-- Good about.There, the next word begins with a vowel sound, so I flap the tongue and connect the two words.

就这样，接下来的单字以一个母音作开头，所以我弹了一下舌头来把两个单字连在一起。

When you think about it, the tongue position for the D, ddd, with the tongue tip up, is really similar to the N, nnn.

仔细想想，D, ddd 的舌位，舌尖向上，与 N, nnn 非常相似。