它们是用来停止堆叠查核行程，并限制已拥有特定使用权限的呼叫端存取。
They are used to stop stack walks and limit the access of callers who have already been granted certain permissions.
堆叠查核行程要求呼叫堆叠中的所有程式码都必须具有存取受保护资源的使用权限。
The stack walk requires that all code in the call stack has permission to access a protected resource.
由于连结要求不会执行堆叠查核行程，因此堆叠查核行程修饰词对连结要求没有影响。
Because link demands do not perform a stack walk, the stack walk modifiers have no effect on link demands.
需求将在您的程序码被呼叫时叫用堆叠查核行程，在堆叠上检查直接或间接呼叫程序码的所有呼叫端。
Demands invoke a stack walk, in which all callers that directly or indirectly call your code are checked on the stack when your code is called.
若要使执行效能最佳化，您可以让您的程序码执行较少的堆叠查核行程，然而，您必须确定并没有泄露任何安全漏洞。
To optimize performance, you can have your code perform fewer stack walks; however, you must be sure that you do not expose a security weakness whenever you do this.
这个单位会加入至堆叠，然后使用者可以查核堆叠行程以复原每个动作。
This unit is added to a stack and the user can then walk the stack to undo each action.
这个单位会加入至堆叠，然后使用者可以查核堆叠行程以复原每个动作。
This unit is added to a stack and the user can then walk the stack to undo each action.
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