The semispinalis thoracis muscle is a deep muscle in the back that supports movement from the neck to the waist.

The semispinalis cervicis muscle is a part of the neck muscles, helping to pull the head back.

I'm so busy with work, I could use all the help I can get.

He was so relaxed that his hands were behind his back.

He is having his hands full with the new project.

He worked as a rear gunner in a fighter plane.

This handover is our new project.

This problem is difficult, and I give up.

He works as a switchman at a railway company.

He is my chauffeur.