to make sure that modules in database 2 cannot access resources outside that database 中的模块无法访问该数据库外的资源。
for example, assume that you have a situation where impersonated contexts from one database, database 1, should be trusted while contexts from another database, database 2, should not be trusted, and both have the same owner who is trusted as an authenticator in the target scope 例如,假设有一种情况,其中一个数据库(database1)的模拟上下文应该被信任,而另一数据库(database2)的模拟上下文不应该被信任,并且两个数据库具有相同的所有者,在目标范围内该所有者被信任为身份验证者。