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柯林斯高阶英汉双解学习词典释义
英汉词典释义
英英词典释义
  • Noun
    1. education or instruction in the fundamentals of a field of knowledge;
    "he lacks the foundation necessary for advanced study""a good grounding in mathematics"
    2. fastening electrical equipment to earth
行业词典
  • 计算机: 接地(技术,方法);