状态对象是不变的，这就是说，一旦它被创建就不能被消出或者重建。
A state object is immutable, that is, once it is created it cannot be changed without being destroyed and recreated.
1950年它被疯了的牧师焚毁，但是它已经被完全地重建了。
In 1950 it was burned down by mad priest, but it has been completely rebuilt.
1950年它被疯了的牧师焚毁，但是它已经被完全地重建了。
In 1950 it was burned down by mad priest, but it has been completely rebuilt.
应用推荐