a scar on his cheek的用法和样例：
- He had a scar on his arm from an accident.
- Then she asked tentatively about the scar on his cheek.
- Also, with quick, critical eye, she noted a scar on his cheek, another that peeped out from under the hair of the forehead, and a third that ran down and disappeared under the starched collar.
- The cut left a scar on his knee.
- The accident left a scar on his forehead.