feet

例句：

1. 1. He stepped on the grass with his feet.
   他用脚踩在草地上。
2. 2. She danced to the music with her feet in the air.
   她随着音乐跳舞，双脚在空中。
3. 3. The dog wagged its tail as it walked along the beach.
   狗沿着海滩散步时摇着尾巴。