body of metacarpal bone

例句：

1. 1.The metacarpal bone is the first bone in the hand.
   腕骨是手的第一块骨头。
2. 2. He injured his metacarpal bone while playing football.
   他在踢足球时伤了腕骨。
3. 3. She was able to identify the metacarpal bone by feeling it with her fingers.
   她能够通过用手指触摸来识别腕骨。