a copyright convention的用法和样例：
- The newspaper put a copyright slug over her story.
- It is illegal to take copies of a copyright work.
- The system of compulsory permission was regulated in The Berne Convention and the Universal Copyright Convention in detail.
- The opposing view lies behind the Universal Copyright Convention adopted in Geneva in 1952. Under this philosophy the law should give only as much protection as is necessary to induce authors to create and disseminate their works.