| 单词 | efficiency |
| 释义 | Word Frequency efficiency(ɪˈfɪʃənsɪ) nounWord forms: plural -cies 1. the quality or state of being efficient; competence; effectiveness 2. the ratio of the useful work done by a machine, engine, device, etc, to the energy supplied to it, often expressed as a percentage See also thermal efficiency |
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