Some pharyngeal jaws have formed to eat food too hard for most fishes.

有些咽颌的形成是为了能吃对大部分鱼类而言太硬的食物。

Other pharyngeal jaws are adapted to suit incredibly specific circumstances.

其他的咽颌的演化则是为了非常特定的用途。

Some pharyngeal jaws actively chew, while others retract to pull chunks of food down the throat.

有些咽颌能咀嚼，也有些咽颌会缩回，把食物块拉进喉咙。

Unlike oral jaws connected by a bone joint, these pharyngeal jaws were suspended in muscle, offering them a wide range of motion to turn, tug, and tear on food.

口颌是用骨头关节来连结，咽颌却是直接嵌在肌肉中，让它们能够做出各种动作，来旋转、拉扯，和撕裂食物。

California Sheephead use pointed teeth from their oral jaws to pry urchins off rocks before crushing their spiny exteriors in strong pharyngeal jaws that have fused with the bones of their skulls.

美丽突额隆头鱼会用它们口颌上的的尖牙把海胆从石头上撬下来，然后再用和头骨融合的强力咽颌粉碎掉它们有刺的外壳。