adj.似乎不真实的，不令人信服的，难以相信的

His argument for why he should get a raise was unconvincing; it lacked concrete evidence of his contributions.
他为什么应该加薪的论点缺乏具体贡献的证据，因此显得不具说服力。
The suspect's alibi was unconvincing and full of inconsistencies, leading the detectives to dig deeper into the case.
嫌疑人的不在场证明不具说服力且充满矛盾，这让侦探们决定更深入地调查此案。
Despite her efforts, the actress's portrayal of the complex character was unconvincing, failing to capture the audience's empathy.
尽管她付出了努力，但这位女演员对复杂角色的塑造并不令人信服，未能赢得观众的共鸣。
The salesperson's claims about the product's miraculous effects were unconvincing; I needed more scientific proof to believe them.
销售人员关于产品神奇效果的说法缺乏说服力，我需要更多的科学证据来相信这些说法。
The defendant's explanation for the missing funds was unconvincing, further raising suspicions among the jurors.
被告人对失踪资金的解释没有说服力，这进一步加剧了陪审员们的怀疑。
Her excuse for being late to the meeting was unconvincing – it was clear she hadn't made an effort to be on time.
她迟到会议的借口显得不具说服力，显然她并没有努力按时到达。
The movie's plot twist, intended to be shocking, felt unconvincing due to poor character development earlier in the story.
电影中本意为震撼的剧情转折，由于故事前期角色发展不足而显得不够说服力。
The politician's promises during the debate were unconvincing; they seemed more like empty rhetoric than genuine commitments.
政客在辩论中的承诺缺乏说服力，更像是空洞的说辞而非真诚的承诺。
The student's essay presented several arguments, but they were all unconvincing due to lack of supporting evidence and clear logic.
学生的论文提出了几个观点，但由于缺乏有力的证据和清晰的逻辑，这些观点都不具说服力。
The company's attempt to justify the price hike with vague statements about rising costs was unconvincing to its customers.
公司试图用关于成本上升的模糊声明来为其提价行为辩护，这一做法并未能说服其客户。