口气

例句：

1. 1. He spoke with a friendly tone.
   他说话的语气很友好。
2. 2. She gave me a stern look to emphasize her point.
   她用严肃的表情强调她的观点。
3. 3. The teacher's tone made the students feel nervous.
   老师的语气让学生们感到紧张。