求翻译：正当防卫是我国刑法重要制度之一。正当防卫的目的是为了排除和制止不法侵害保护公共财产和公民的人生财产安全。对于正当防卫的界定有利于鼓励广大人民群众同违法犯罪做斗争，及时消除制止不法侵害行为，有效的惩治犯罪，保卫社会稳定有着积极重要的意义。是什么意思？

Defense is one of the important Chinese criminal law system. Defense was designed to exclude the protection of public property and the Suppression of unlawful practices and the safety of life and property of citizens. For definition of justifiable defense conducive to encouraging the masses with the fight against crime, eliminate the Suppression of acts of unlawful infringement in a timely manner, effective punishment of the crime, defend social stability has a positive and important significance.