我已经很久没教过这门课了，所以我怀疑你在大学阶段可能没有学过关于那个时期的内容。

And I haven't offered it in quite a while now, so I doubt you ever studied that period on the college level.

youdao

关于胡马拉的主要怀疑就是他是不是卢拉。

The main doubt aboutMr Humala is that he is not Lula.

youdao

正如我说的，请注意这是关于怀疑论的一般性问题。

So as I say, notice that this is a general problem for scepticism.

youdao