This has the effect that concurrently running applications that access common resources are protected against system crash and errors that come from resource conflicts.
这使得并行运行的应用程序在访问共享资源时得到保护，避免由于资源冲突而产生的资源冲突甚至崩溃。
2
If your code simply calls a secure system library that exposes a protectedresource, you do not need to demand a permission just because the library exposes the resource protected by that permission.
The basic philosophy of portal-based Single Sign on is to provide unlimited and safe accessing the protected application resource integrated in the portal system with SSO (Single Sign-on).