tail arm

例句：

1. 1. The dog's tail is wagging excitedly.
   狗的尾巴在兴奋地摇动。
2. 2. He reached for the water bottle with his left arm.
   他用左臂去拿水瓶。
3. 3.She held her head high as she walked down the aisle.
   她走路时昂首阔步。