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  1. Efficiency Definition & Meaning - Merriam-Webster

  2. Efficiency: What It Means in Economics, the Formula To Measure It

  3. EFFICIENCY Definition & Meaning | Dictionary.com

  4. EFFICIENCY | definition in the Cambridge English Dictionary

  5. Efficiency - Wikipedia

  6. EFFICIENCY | English meaning - Cambridge Dictionary

  7. efficiency noun - Definition, pictures, pronunciation and usage …

  8. EFFICIENCY中文(简体)翻译:剑桥词典 - Cambridge Dictionary

  9. EFFICIENCY definition and meaning | Collins English Dictionary

  10. Efficiency Definition & Meaning | Britannica Dictionary