This is not some new or controversial faith teaching .

这不是一些新的有争议的信念教条。

The question is both important and controversial .

这个问题不仅重要而且还有争议性。

But it also recognises that the subject is controversial .

不过他们也承认这个话题是有争议的。

These findings shouldn 't be that controversial .

这些调查结果不该是有争议的。

In practice , it is often controversial .

但实际上，这常常是有争议的。