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1A shoe heel made of rubber.
2Slang. A person who investigates the conduct of members of his or her own organization; specifically an internal police investigator.
Mid 19th century. From rubber + heel.
礼仪网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。