In response to the Moral Decline Theory and the Right Abuse Doctrine which both claim that the legalization of euthanasia will probably have harmful consequences,this article consider that the Moral Decline Theory is a theoretical imagination and has no support practically,while the Right Abuse Doctrine is not appropriate in the discussion on the legalization of euthanasia.

Article 7 of "General Civil Law"of PRC Is regarded as the principle of public order and good habits or prohibition of civil right abuse in legal theory and practice.

Abuse of Rights in Well-known Trademark s Protection and Its Legal Regulation;

Along with the changes of society, people s concept towards the rights has also been changing,from "sacredness of private rights" "absolute rights", to putting forward an appropriate limitation to forbidding the abuse of rights, and the forbidding abuse of rights has been gradually set up as a basic principle in civil laws.

However, international tax avoidance is an action of abuse of rights.

This view is right but not perfect, because there are some differences between Abuse of Right and monopoly actionFrom the angle of balance in benefit, this article discusses Legal Regulate the Misuse of the Patent Pool Rights.