We shouldn't be surprised.

我们不应该吃惊。

youdao

You shouldn't be surprised (that) he didn't come.

他没来，你不必感到意外。

《牛津词典》

Don't be surprised if I pretend not to recognise you.

要是我假装不认识你，你别觉得奇怪。

《牛津词典》

Nineteenth century workers would probably be surprised to know that their pants would one day become a fashion object.

VOA: special.2009.12.18

Well, you won't be surprised to hear it's the same solution. So let's look at that code.

好了，听到二者是一样你可别惊讶,让我们看看代码。

麻省理工公开课 - 计算机科学及编程导论课程节选

when you allow yourself to be present in situations and be surprised from them, you know.

那是当你把自己放在一种情境下，让自己感到惊奇的时候。

艺术从自由起步 - SpeakingMax英语口语达人

Initially, colleagues and the public could be surprised to see a female within the job.

BBC: NEWS | UK | Wales | 'If a gran can do it, anyone can'

Being digital, you won't be surprised to hear the process doesn't stop with merely showing you an image.

BBC: Digital product placement creates adverts out of thin air

Can anyone possibly be surprised that using the same data gets the same result?

FORBES: Keep This Bit of News On the QT: The Earth Is Round!!!