The department offers four specialities.

这个系有四个专业。

These are our local specialities.

这些都是我们的地方特色菜。

They are specialities of our village.

这可是我们村子的特产。

What are the specialities of the house?

你们这有什么特色菜？

I would like some of your local specialities.

我想要一些你们的特色菜。