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A special feature or technique kept secret by an organization and regarded as being the chief factor in its success.
A special quality or feature regarded as the chief factor in the success of something or someone.
雅致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。