肘

例句：

1. 1. He reached his arm behind his back to touch his elbow.
   他伸手到背后去摸他的肘部。
2. 2. She lifted her arm to show the model the new dress she had designed.
   她抬起手臂，向模特展示她设计的新款连衣裙。
3. 3. The doctor advised him to rest his elbow for a few days.
   医生建议他休息几天肘部。