Objective:To observe the blood supplies system of the lower jaw bone and provide anatomical basis for clinical surgery of mandible.

目的：研究下颌骨的血供，为有关下颌骨的外科临床提供解剖学基础。

This special fatty tissue, the only other place is found in the dolphin, is in the lower jaw.

而在海豚身上的其他地方，唯一发现有这种特殊的脂肪组织的地方就是下颌。

Most of the fat that you find in an animal's body is used for storing energy, but this fat, which you find in dolphins, and only in the melon and around the lower jaw.

动物体内的大部分脂肪是用来储存能量的，但是你在海豚体内发现的这种脂肪，只存在于鼻疣和下颌周围。

The sounds bounce off them and the lower jaw captures the returning sounds, making it possible for the dolphin to sense what's in the surrounding water and decide where to swim.

声音从它们那里折射，下颌捕捉到返回的声音，使海豚能够感受到周围水域中有什么，并决定游向哪里。