xiphopagus

例句：

1. 1. The snakehead is the leader of the group.
   蛇头是这个团体的领导者。
2. 2. The snaketail was a weak link in the chain.
   蛇尾是链条中的薄弱环节。
3. 3.The snakehead and snaketail were both important members of the team.
   蛇头和蛇尾都是团队中的重要成员。