In particular, even though the validity of wildlife husbandry for sustainable use is gradually being affirmed, herd populations are too low in some species for stable propagation, and not every species can be restored as desired to its original state.
尤其永續經營野生動物的方式，雖然逐漸受到認可，但動物穩定繁衍的數量既已被打破，並不是每一種動物都能任人隨心所欲，就妙手回春，恢復原貌，達到永續經營的理想。