It might mean standing to answer the phone and pacing the room, tapping your feet on the floor as you work.
比如，你可以站着接电话、可以在房间里溜达、办公时双脚可以拍拍地板。
All those not dancing were tapping their feet on the floor.
那些不跳舞的人都用脚在地板上轻轻地拍打着。
The old man began to beat time, tapping one foot on the dirt floor.
那位老人 开始一只脚在脏地板上打起了拍子。
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