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单词 motive power
释义

WordReference Random House Unabridged Dictionary of American English © 2024
motive power, 
    1. Mechanicsany power used to impart motion;
      any source of mechanical energy.
    2. Rail Transportlocomotives or other vehicles that supply tractive power.
    • 1615–25

Collins Concise English Dictionary © HarperCollins Publishers::
motive power n
  1. any source of energy used to produce motion
  2. the means of supplying power to an engine, vehicle, etc
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