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。

youdao

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。

youdao

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。

youdao

The passwords themselves were encrypted, meaning they couldn't be read without breaking the secret code that protected them.

FORBES: The Lawyer Hackers Call

So from the start, my concern was making sure that we had a tax code that was fair and that protected the middle class, and my biggest priority was making sure that middle-class taxes did not go up.

WHITEHOUSE: President Obama Holds a News Conference

Ofcom found Channel 4 in breach of rule 1.3 of the broadcasting code, which states children must be protected by appropriate scheduling from material that is unsuitable for them.

BBC: Hugh Jackman in Wolverine