胳臂

例句：

1. 1. He stretched his arm out to touch the sky.
   他伸展手臂试图触摸天空。
2. 2. She held her arm up to block the sun's rays.
   她举起手臂挡住太阳光。
3. 3. The man lifted his arm to show his appreciation.
   那男人抬起手臂表示他的感激。