证明者

例句：

1. 1. The lawyer presented the evidence to prove his client's innocence.
   律师出示证据以证明其客户的清白。
2. 2. The judge asked the witnesses to recount their observations during the trial.
   法官询问证人在审判期间的观察。
3. 3. The politician used his credentials as a former government official to bolster his argument.
   这位政治家利用他作为前政府官员的资历来加强他的论点。