a painless death的用法和样例：
- It was a painless death.
- He felt the situation between him and the two women was too difficult to handle and prayed that he would be able to handle it smoothly and cleanly and let Miss Su's affections toward him die a painless death.
- The most common presenting symptom is a painless mass.
- A cataract is a painless clouding of the lens of the eye.