You can't write bulletproof and error-protected code without knowing where the most problematic issues arise; that's what this and the next few articles focus on.
不知道问题的关键在哪里，就不能编写防弹代码和错误检查代码；这正是本文以及后面几篇文章的核心。
Cleanup occurs even when an exception is raised by the protected code.
即使受保护的代码引发异常，也进行清理。
Enables code to demand that its callers possess a digital signature, thus allowing only callers from a particular organization or site to call the protected code.
使代码能够要求其调用方拥有数字签名，从而只允许特定组织或特定站点的调用方来调用受保护的代码。
Enables code to demand that its callers possess a digital signature, thus allowing only callers from a particular organization or site to call the protected code.
使代码能够要求其调用方拥有数字签名，从而只允许特定组织或特定站点的调用方来调用受保护的代码。
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