From the higher perspective all is in perfect order, but from the perspective of humankind within duality, it is not!
在更高角度来看一切却是在完美安排之中，但是从人类二元性的角度来看，不是如此！
2
The duality of transformers (ideal and perfect models) is investigated. In addition, the duality relationships of duty ratio parameters and semiconductor-switch topologies are also given.