gatemouth

例句：

1. 1. Shehad a gatemouth smile that made herlook younger.
   她有一个微笑，看起来比实际年轻。
2. 2. Thedentist advised him to have hisgatemouth fixed.
   牙医建议他修复他的门牙。
3. 3. He was always complaining about the gatemouth in his mouth.
   他总是抱怨嘴里的门牙。