dent corn

例句：

1. 1. She had a dent in her tooth when she was young.
   她年轻时牙齿上有一颗洞。
2. 2. The dentist advised him to see a specialist for his problem.
   牙医建议他去看专家治疗他的病。
3. 3. He had a dent in his pocket where he kept his keys.
   他在口袋里有一个洞，用来放钥匙。