取得增益集的应用程序定义域。

Get the add-in's application domain.

应用程式定义域的原则只能设定一次。

Policy can be set only once for an application domain.

然而，这又是一个用于定义域的罕见概念。

However, this again is a rare concept that is used in defining the domains.

安全性原则也决定哪一些使用权限会授与给应用程式定义域。

Security policy also determines which permissions to grant to application domains.

在函数概念教学中 ，往往容易忽略其定义域为非空数集这一要素 。

People are likely to overlook in teaching the essential factor that the domain of definition of function concept is just the nonempty set of number.