singular successor

例句：

1. 1. The company's new CEO is its singular successor.
   公司的新任首席执行官是其唯一的继承人。
2. 2.The task of selecting the next leader was left to the singular successor.
   选拔下一任领导者的任务留给了唯一的继承人。
3. 3. He was the only one who could be considered as the singular successor for the job.
   他是唯一一个可以被认为是这项工作的唯一继承人。