StackInhibit
 Usage
• StackInhibit[expr] 不修改计算堆栈地计算 expr.
Notes
• 当使用Stack来查看计算堆栈时,你可以使用StackInhibit来防止出现在其"最内层"的计算. • StackInhibit 具有HoldFirst属性.
 Further Examples
StackInhibit prevents Print from being included on the stack.
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 StackBegin[expr] uses a fresh stack in the evaluation of expr.
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