在阵的情况下，实际上是修改阵列，因此如果一个参考的改变，因此是其他。

In the array case, you're actually modifying the array, and thus if one reference is changed, so is the other.

在字符串的情况下，你的不可以修改对象，你只是分配的不同的对象的引用。
正如你指出的： A = B 的意思是让指向同一个对象为B指向。按照同样的思路， A =RRR的意思是让指向文字RRR，里面有无关用b。

In the string case, you are not modifying the object, you are simply assigning a different object to that reference. As you noted: a=b means "let a point to the same object as b is pointing". Following the same line of thought, a="rrr" means "let a point to the literal "rrr"", which has nothing to do with with b.