assertor

例句：

1. 1.The assertor was right about the matter.
   断言者对这件事是正确的。
2. 2. The assertor made a strong argument for the cause.
   断言者为这个事业提出了有力的论据。
3. 3. The assertor's words were convincing.
   断言者的话很有说服力。