我在文章中特别讨论了perpetual的应有的正确的意思。。。自古以来的意思。。。下面是相关论述：

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： 

• 你自己从新定义了，怪不得别人不理解。这不是自古或universal的定义2 -老键- ♂ (0 bytes) () 01/03/2022 postreply 21:01:19

• 自古就没有热力学定律。。。今天的永动机和热力学定律绑在一起并不合理。。。 -慕容青草- ♂ (0 bytes) () 01/03/2022 postreply 21:22:13