tooth复数形式怎么写什么意思

I need to have two teeth filled.

我有两颗牙要补。

Choose an essay topic that you can really get your teeth into.

选择一个你可以真正悉心钻研的论文题目。

A high proportion of five-year-olds have teeth in poor condition.

五岁儿童牙齿不健康的比例高。

The dentist may decide that the wisdom teeth need to be extracted.

牙医可能会认为智齿需要拔掉。

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。