令人难以置信

He argued unconvincingly that the increase in taxes would benefit everyone.
他缺乏说服力地辩称增税将使每个人受益。
The suspect gave an unconvincingly vague alibi for the night of the crime.
嫌疑人对于犯罪当晚的不在场证明含糊其辞，缺乏说服力。
She tried to defend her actions unconvincingly, but everyone could see through her excuses.
她试图无力地为自己的行为辩护，但人人都能看穿她的借口。
The salesman's pitch was unconvincingly optimistic about the product's capabilities.
销售员对产品功能的推销显得过于乐观，缺乏说服力。
He denied the allegations unconvincingly, his nervousness betraying his true feelings.
他不具说服力地否认了那些指控，他的紧张暴露了真实感受。
The actor's portrayal of the character was unconvincingly shallow, lacking depth and authenticity.
这位演员对角色的塑造肤浅且缺乏说服力，没有深度和真实性。
The student presented an unconvincingly researched paper, with many facts not supported by credible sources.
这名学生提交的研究论文缺乏说服力，许多事实没有可靠来源的支持。
The company's PR statement addressed the crisis unconvincingly, failing to alleviate public concerns.
公司的公关声明对危机处理得缺乏说服力，未能缓解公众的担忧。
Despite her attempts to sound confident, her explanation came across as unconvincingly hesitant.
尽管她努力听起来自信，但她的解释显得犹豫不决，缺乏说服力。
The witness's account of the event was unconvincingly inconsistent, raising doubts about its accuracy.
证人对事件的描述前后矛盾，缺乏说服力，让人对其准确性产生怀疑。