adj.缺乏的，不足的，缺少的，有缺点的，有缺陷的

Tom's theory is deficient in several respects.
汤姆的理论有几个方面的不足。
The evidence she gave us was deficient.
她提供给我们的证据是不充分的。
Eric is deficient in energy.
埃里克精力不足。
The soil in this region is deficient in essential nutrients, making it difficult for plants to grow.
这个地区的土壤缺乏必需的营养元素，使得植物难以生长。
Due to a vitamin D deficiency, she experienced fatigue and muscle weakness.
因为维生素D的缺乏，她感到疲惫并且肌肉无力。
The team's performance was deficient because of poor communication among members.
由于队员之间沟通不畅，团队的表现不尽如人意。
The report was found to be deficient in several key areas, requiring further research.
报告在几个关键领域被发现有不足，需要进一步的研究。
The school's library is seriously deficient in up-to-date scientific literature.
学校图书馆严重缺乏最新的科学文献。
His argument was logically deficient, failing to address the main counterpoints.
他的论点逻辑上不足，没有针对主要的反驳观点进行论述。
The company's customer service was cited as deficient, with long wait times and unhelpful staff.
该公司的客户服务被批评为不足，客户等待时间长且员工帮助不大。
The diet lacking sufficient fiber is deficient and can lead to digestive problems.
缺乏足够纤维的饮食是不完善的，可能会导致消化问题。
The emergency response plan was identified as deficient during the drill, highlighting the need for improvement.
在演练中发现紧急应对计划存在缺陷，突显了改进的必要性。
Her essay was marked as deficient in original thought, despite being well-researched.
她的文章尽管研究充分，但因缺乏原创思想而被评为不足。