It's a mix of kind of permanent exhibitions and some temporary ones which come and go.

这里混合了长期展厅和不时更换的临时展厅。

一眼看历史 - SpeakingMax英语口语达人

even the standard exhibitions, just going over and over again,

连普通的展览，我也是去了一次又一次。

大都会艺术博物馆 - SpeakingMax英语口语达人