a pained look的用法和样例：
- The nurse developed a pained look.
- He has a shiner around his left eye and a pained look on his face, and he is stomping toward them.
- You filled out the paperwork and said,know you will find a good home for her.?They shrugged and gave you a pained look.
- A pained look of bewilderment crossed Maul's tattooed face as death overtook him. His body fell into the melting pit, splitting in two as it tumbled into oblivion.
- She showed a pained look.