So, what they do is, the first time they might scratch at the bars, push at the ceiling, dig at the floor, howl, etc.

起初小猫可能会抓栏杆，推顶棚，挖底板，吼叫等等。

耶鲁公开课 - 心理学导论课程节选

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

At that instant, if you leave anything on the floor, you know it's no longer yours.

这个时候,如果你掉了些什么在地上,它就不再是你的了

耶鲁公开课 - 基础物理课程节选