较短变量赋值的数据丢失.Loss of data on an assignment to a shorter variable.但是只读的值是不同的, 因为它们是在运行时被赋值的.But read - only values are different, in that they are assigned at runtime.将所有对该变量的引用动作,替换为对它赋值的那个表达式自身.Replace all references to ...