In this nasal region are liplike flaps of tissue called dorsal bursae that vibrate and collide to produce dolphin talk.

海豚的鼻区有被称为背侧黏液囊的唇形片状瓣膜，通过振动和碰撞让海豚能够“讲话”。

The initial thud comes from when those dorsal bursae collide.

最初的撞击声来自背侧黏液囊的碰撞。

I can't take you seriously when you say bursa sac.

你说关节囊的时候 能不能正经。

But Thode the younger says the bursae have to be somewhat sticky for the clapping together and snapping apart to produce a noise with the correct loudness and pitch.

但是轻的索德说，滑囊必须有粘，才能拍在一起并啪地一声分开，以产生具有正确响度和音高的声音。