animal welfare[动物福利];

　　animal abuse[虐待动物]

　　- eg: Animal rights advocates all over the world believe strict regulations are required to reduce animal abuse.;

　　animal experimentation[动物实验]/animal testing;

　　humane[人道的]。

　　ethical[道德的]

　　-eg: in ethical manner[道德方面]，The benefits to humans don't justify the harm to animal on an ethical basis.;

　　on moral grounds[从道德上讲]

　　-eg: Some animal rights activists argue that the animal testing is unjustifiable on moral grounds。