故名思意，“隐式类型局部变量”将无法用于域变量或常量的声明中，否则将导致编译错误。

Also as the name says, implicitly typed local variable, you cannot use var for field declaration or constant variables, therefore following declarations will both produce a compiler error.

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还要设置变量作用域，以限制变量只在某个“会话”中活动。

Set the variable scope to limit variables to live only within a "session".

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例如，在第6章中对栈和寄存器结构的解释要联系到第4章中对变量作用域的解释。

For example, the explanation of stacks and register frames in Chapter 6 connected with Chapter 4's explanation of variable scope.

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