small dorsorecti muscle

例句：

1. 1.The small dorsorecti muscle is responsible for supporting the upper back.
   小背阔肌负责支撑上背部。
2. 2.During exercise, the small dorsorecti muscle helps to stabilize the spine.
   锻炼时，小背阔肌有助于稳定脊柱。
3. 3.Athletes often work on strengthening their small dorsorecti muscles to improve performance.
   运动员经常努力加强小背阔肌，以提高表现。