tooth

名词 tooth:

1. hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense
2. something resembling the tooth of an animal
3. toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell
4. a means of enforcement
5. one of a number of uniform projections on a gear

1. This tooth is sensitive to cold.
   这颗牙对冷过敏。
2. He bellowed with pain when the tooth was pulled out.
   牙被拔掉时，他疼得大叫。
3. I was fitted an artificial tooth by the dentist.
   牙医给我镶了颗假牙。
4. Now you know what the job involves here's something to get your teeth into.
   你既然对这项工作已有所了解，有些事就由你去处理吧。
5. We should brush our teeth at least twice a day.
   我们每天应该至少刷两次牙。