It gives you the ability to protect a resource with a defined security constraint and then define the user roles that can access the protected resource.
它向您提供使用定义的安全约束保护资源的能力，然后定义可以访问受保护资源的用户角色。
2
The idea of BAM everywhere is to take advantage of the "timeliness" of information as soon as the need arises without the constraint of a single access mechanism.
无处不在的BAM的基本思想是在需要一出现时就利用信息的“及时性”，而无单一访问机制的约束。
3
Insecurity, with the resulting lack of access to disease-endemic areas, is a major constraint, especially in countries where cases are still occurring, namely Chad, Ethiopia, Mali and South Sudan.