| 单词 | perpetual motion machine of the first kind |
| 释义 | perpetual motion machine of the first kind [pǝr`pech·ǝ·wǝl `mō·shǝn mǝ´shēn ǝv thǝ `fǝrst ´kīnd] PHYSICS A mechanism which, once set in motion, continues to do useful work without an input of energy, or which produces more energy than is absorbed in its operation; it violates the principle of conservation of energy. |
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