我在文章中特別討論了perpetual的應有的正確的意思。。。自古以來的意思。。。下麵是相關論述：

Practically, if a machine can continuously do nonstop work for the human users without the need of manual replenishment of energy, even if it consumes some energy from sun or earth all the time, it would be a perpetual motion machine to humans. We don’t need look at the issue with a universally valid perspective in the sense that no useful energy would be turned into wasted energy and no non-reducible entropy increase would be produced at all or even exclude the use of energy from the natural environment. Much bigger troubles would overwhelm the issue of the validity of a perpetual motion definition in case our sun or earth would stop functioning properly or we might lose our atmosphere. Therefore, it is more important for us to get to know about how nature might provide mechanisms for locally perpetual motions, instead of discouraging or even forbidding the claim of the perpetual motion machine by scrutinizing whether the machine would consume extra energy or external material resources in the strictest universally valid sense.

所有跟帖： 

• 你自己從新定義了，怪不得別人不理解。這不是自古或universal的定義2 -老鍵- ♂ (0 bytes) () 01/03/2022 postreply 21:01:19

• 自古就沒有熱力學定律。。。今天的永動機和熱力學定律綁在一起並不合理。。。 -慕容青草- ♂ (0 bytes) () 01/03/2022 postreply 21:22:13