n.牙齿，齿，牙，齿状部分
v.使具齿状；给…装牙齿；刻齿；(用牙齿)咬(住)

原形：tooth复数：teeth

I pulled out a tooth in hospital yesterday.
我昨天在医院里拔了一颗牙。
We fought tooth and nail to pass the exam.
我们努力争取通过考试。
You should choose an major that you can really get your teeth into.
你应该选择一个你可以真正悉心钻研的专业。
I need to brush my teeth before going to bed.
我需要在睡觉前刷牙。
She has a cavity in one of her front teeth.
她的一颗门牙有龋洞。
The baby's first tooth is just coming through.
宝宝的第一颗牙齿正在长出来。
He clenched his teeth in pain.
他因疼痛而紧咬牙关。
The dentist recommended I get a tooth filling.
牙医建议我做牙齿填充。
I grind my teeth when I'm stressed.
我压力大的时候会磨牙。
She had her wisdom teeth removed last week.
她上周拔掉了智齿。
He has a toothache and needs to see the dentist.
他牙痛，需要看牙医。
The toothpaste contains fluoride to strengthen teeth.
这种牙膏含有氟化物，可以强化牙齿。
The child was afraid of the dentist, but he bravely let him pull out the loose tooth.
这个孩子害怕牙医，但他勇敢地让他拔掉了松动的牙齿。