ulmin

例句：

1. 1.The ulna is the longest bone in the human arm.
   尺骨是人类手臂中最长的骨头。
2. 2.She was ulminating through the woods, lost in thought.
   她迷失在树林中，陷入了沉思。
3. 3. The ulna is crucial for supporting the hand and wrist joints.
   尺骨对于支撑手和腕关节至关重要。