Bashing politicians is normal practice in the press.

严厉批判政治人物乃是新闻界常事。

It is our normal practice to do STH.

做某事是我们通常的做法。

We were surprised by their departure from their normal practice.

他们没有遵循(违反)常规，咱们特别很是惊讶。

We were surprised by their departure from their normal practice.

他们没有遵守(违背)常规，我们非常惊奇。

That is why the case you brought up is still under a normal practice.

故此，你提出的情况依然属于正常做法。