tooth的复数形式为teeth，为名词复数不规则变化形式。tooth作名词的意思是牙齿、齿、齿状部分；作动词时意思是给……装齿、啮合。常见短语搭配tooth profile：齿形；tooth surface：齿面；tooth decay：蛀牙；tooth root：牙根。

相关例句：1、Draw the floss backwards and forwards between the teeth.

将牙线在齿间来回拉动。

2、They took a plaster cast of the teeth for identification purposes.

他们做了这副牙的石膏模型作鉴别之用。

3、He laughed,revealing a line of white teeth.

他笑了起来，露出一排洁白的牙齿。

4、Dentists advise you to have your teeth checked every six months.

牙医建议大家每六个月检查一次牙齿。

5、Her teeth gleamed white against the tanned skin of her face.

她的牙齿在褐色面孔映衬下显得洁白明亮。