licence

licence　许可证，牌照，特许文件　

Revocable written（formal）or implied agreement by and under specified conditions）to prevent another party（the licensor）from engaging in certain activity that is normally forbidden（such as selling liquor or making copies of a copyrighted work）.Intellectual property licenses generally mean that the licensor will not invoke ownership protection laws if the licensed property（art，design，patent，etc.）is copied，sold，or used by the licensee.A license is not a right，because the licensor may not have the legal power to give all necessary permissions that constitute a legal right.It is also not a lease，and is not assignable by the licensee.Also called permit.