caudal salivatory nucleus

例句：

1. 1. The fish swims with its tail pointed downward.
   这条鱼游动时尾巴指向下方。
2. 2. The animal has a caudal fin to help it swim.
   这种动物有尾鳍来帮助它游泳。
3. 3.The scientist studied the behavior of crayfish and found that they use their caudal fins for propulsion.
   科学家研究了河蟹的行为，发现它们使用尾鳍作为推进力。