closed subscheme

例句：

1. 1. The closed subscheme is designed to prevent unauthorized access.
   这个封闭子方案的设计是为了防止未经授权的访问。
2. 2.The closed subscheme has been successfully implemented in our project.
   这个封闭子方案在我们的项目中已经成功地实施了。
3. 3.The closed subscheme provides a secure and efficient way to manage data.
   这个封闭子方案提供了一个安全且高效的数据管理方式。