a stern teacher的用法和样例：
- Zhou is also a likable teacher, as for English teacher, all of us think she is a stern teacher, We like her not greatly.
- She had a stern father who never praised her.
- Our team made a stern resolve to win.
- He received a stern rebuke from his superior.
- The lazy boy stood in awe of his stern teacher.
- The judge was a stern,unapproachable man.