Draw the floss backwards and forwards between the teeth.
将牙线在齿间来回拉动。
The front cog has 44 teeth.
前齿轮有44个齿。
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。
