sustentaculum tail

例句：

1. 1. The fish had a long, slender body with a distinctively curved snout and a long, tapering tail.
   这条鱼有着长而细的身体，有着独特的弯曲的鼻子和长长的、逐渐变细的尾巴。
2. 2. The scientist discovered that the tail of the new species was different from its parent species.
   科学家发现新物种的尾巴与它的父母物种不同。
3. 3. The tail is used for propulsion in swimming and to help the animal maintain balance.
   尾巴用于游泳中的推进作用，帮助动物保持平衡。