It is only in the intersectionset up signs asking drivers to slow down to give way.
人们只得在交叉路口设立标志,要求司机减速、让路。
2
The permissions sets of the caller class and its ancestors (that is, all stack frames above this one) are not included in computing the intersectionset.
调用类和它的上级(即所有在它 上面的堆栈帧)的权限集都 不包括在交集计算中。
3
The basic algorithm for arriving at the final, applicable set of permissions is to compute the intersection of all Pis.