Of course, the birth of concern for animal welfare shows that people are "fed and clothed well enough to think of honor," but this means that it is also part of a set of values which change with the times in response to changing circumstances.
當然，動物福利的誕生，也是「衣食足而知榮辱」的結果，因此有「此一時也，彼一時也」、隨著環境改變的「性質」。