跗面

例句：

1. 1. He sat on the floor, his foot resting on the back of his chair.
   他坐在地板上，脚搁在椅子的背面。
2. 2. The dancer's foot was firmly planted on the floor.
   舞者脚稳稳地踩在地板上。
3. 3. The old man had to shift his weight from one foot to the other as he walked.
   老人走路时不得不交替用脚。