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。

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状瓣膜，通过振动和碰撞让海豚能够“讲话”。

The bursa is actually a sac that lubricates the joint.

滑囊实际上是一个润滑关节的囊状结构。

And these bursa, it turns out, are what's responsible for transferring sound to the melon.

事实证明，这些滑囊负责将声音传递到甜瓜。

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

你说关节囊的时候 能不能正经点。

The sound waves are then transmitted by the bursa through the melon.

然后声波由滑囊通过甜瓜传播。