为更高马力设计的机器在减速中是效率递减的，特别是减速至20节以下。
There are diminishing returns in slow steaming with machinery designed to operate at higher outputs - particularly when reducing speeds to below 20 knots.
驱动这些机器的动力装置是一台50马力的感应电动机。
The power unit for driving the machines is a 50-hp induction motor.
在很多国家，马的这种力量，便被机器的“马力”取而代之了。
And so in many countries the horse's power has been replaced with machine horsepower!
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