They will not be prepared to handle an exception that unexpectedly bubbles up from compare .

它们没有准备好处理compare中意外出现的异常。

youdao

You want to partially handle an exception before passing it on for additional handling.

所需部分处理异常之前将它传递进行额外处理。

youdao

Any arbitrary code can enter a When block to decide whether or not to handle an Exception.

任何的代码都可以添加When去决定是否要处理某个异常。

youdao

What does that say? It says if in the code up here I get an exception of that sort, I'm going to go to this place to handle it.

这意味着如果在代码中,我得到一个这样的异常,我能到这里来处理它。

麻省理工公开课 - 计算机科学及编程导论课程节选