platysma

例句：

1. 1. The platysma muscle is responsible for the movement of the tongue.
   扁鱼肌肉负责舌头的运动。
2. 2. The platysma muscle is also involved in the process of swallowing.
   扁鱼肌肉还参与吞咽过程。
3. 3. The platysma muscle is a unique feature of some species of fish.
   扁鱼肌肉是某些鱼类的独特特征。