纹章局

例句：

1. 1. She lifted her arms to wave goodbye.
   她举起双臂挥手告别。
2. 2. The arm of the chair is too short for me to sit comfortably.
   椅子的胳膊太短，我坐不舒服。
3. 3. He reached out and touched her arm.
   他伸出手去碰了碰她的胳膊。