The union of a and b , writeen as aub , is the set of elements which belong to a or b or to both A与b的并集记为aub ，是属于a或属于b ，或同时属于两者的元素的集合。
Returns a new permission object that is the union of the current and specified permission objects 返回一个新的权限对象，它是当前权限对象和指定权限对象的并集。
Creates and returns a permission that is the union of the current permission and the specified permission 创建并返回一个权限，该权限是当前权限和指定权限的并集。
A new permission object that represents the union of the current permission object and the specified permission object 新权限对象，它表示当前权限对象和指定权限对象的并集。
Creates the smallest possible third rectangle that can contain both of two rectangles that form a union 创建第三个矩形，它是能够同时包含形成并集的两个矩形的可能的最小矩形。
Creates a permission instance that is the union of the current permission instance and the specified permission instance 创建一个是当前权限实例与指定权限实例的并集的权限实例。
Method - level attributes and class - level attributes are unioned together into a single permission set for both levels 方法级属性和类级属性形成并集，作为针对这两种级别的一个单独的权限集。
When overridden in a derived class , creates a permission that is the union of the current permission and the specified permission 在派生类中重写时，创建作为当前权限和指定权限的并集的权限。
The final result set returned by the running query is the union of all result sets generated by the anchor and recursive members 正在运行的查询返回的最终结果集是定位点成员和递归成员生成的所有结果集的并集。
This can be worked out to taking the union of the two sets and then removing from it the elements belonging to the intersection of the two sets 这可以取两个集合的并集，然后从中删除属于两个集合的交集的元素得到。
