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A painstaking search, examination, or investigation is done extremely carefully and thoroughly.
thorough
Forensic experts carried out a painstaking search of the debris.
法证专家对残骸进行了极其仔细的研究。
雅思英语词汇收录8785个雅思英语词条，基本涵盖了全部常用雅思英语词汇的翻译及释义，是英语学习的有利工具。