This can be achieved by setting a global flag in the handler code and checking for the flag after completion of the critical part.

这可以通过在信号处理程序代码中设置一个全局标志并在完成关键部分的代码之后检查这个标志来实现。

youdao

If you write code that USES any extra structure members, you'll have to flag it as not portable and, if you're feeling particularly friendly, include an alternate code path that does the same thing.

如果您编写了使用额外结构成员的代码，那么您必须将其标记为不可移植的，并且包含一个完成相同任务的替换代码路径，如果您认为这样做特别友好的话。

youdao

The code says the American flag is not to be used as decorative clothing.

美国国旗按规定是不能用来设计服装的？

youdao

So that is a flag that tells the compiler that I want to use or link into my own program code that someone else wrote that lives somewhere else on the system whose moniker is CS50.

所以那是一个标记，用来告诉编译器我想使用,或连接我自己的程序代码到一个叫做CS50的系统中的程序,可能其他人在那个系统写了这些程序。

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