The scope of a variable is the region of your program in which it is defined.

一个变量的作用域是程序中定义这个变量的区域。

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Even if the scope of a variable is limited to a block, its lifetime is still that of the entire procedure.

即使变量的范围被限制在某个块内，其生存期仍为整个过程的生存期。

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The narrower the scope of a variable, the fewer opportunities you have for accidentally referring to it in place of another variable with the same name.

变量的范围越窄，引用另一个同名变量时不小心引用到该变量的机会就越少。

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What these discussions need is the introduction of a fourth variable: The programmers using agile methodology will tell you to consider scope.

FORBES: "Release Early and Often" Only Works If You Do It