you would probably spend at least an hour or an hour and a half on each floor.

每层楼你大概要看一个或者一个半小时。

大都会艺术博物馆 - SpeakingMax英语口语达人

.. Let me give you a sense of, in the next half an hour and so, a sense of what you expect in this class.

我再来讲讲，接下来的半小时，我会向你们介绍下这门课的内容。

哈佛公开课 - 幸福课课程节选