metasternum

例句：

1. 1. The vertebral column is the main support of the spine.
   脊柱的椎骨是主要支撑。
2. 2.The metasternum is a part of the vertebral column that connects the rib cage to the spine.
   中轴骨是连接肋骨和脊柱的部分。
3. 3. During surgery, the surgeon must carefully resect the metasternum to avoid damaging vital nerves.
   在手术中，外科医生必须小心切除中轴骨以避免损伤重要神经。