我发现，从具体的实例入手然后再把它重构成一个抽象的例子是非常容易的；反之，如果从抽象的例子入手而把它应用到具体的案例中，则要困难 得多。

I found it much easier to do the concrete example first, then refactor that to the abstract example, than to come up with the abstract example first and then apply that to the concrete case.

youdao

这些可能听起来很抽象，那么让我们看一个实际的例子。

This may sound abstract, so let's have a look at an actual example.

youdao

我父亲允许我以抽象的方式和例子提出问题。

My father allowed me to present my problem in its abstract form and with my examples.

youdao