teeth和tooth的区别

teeth

英 [tiːθ] 美 [tiːθ]

tooth 的复数

例句：

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。

tooth

英 [tuːθ] 美 [tuːθ]

n.牙;齿;齿状部分

复数： teeth

例句：

Many infants do not cut their first tooth until they are a year old.

很多婴儿到一岁大时才开始长牙。

When did she cut her first tooth?

她什么时候长出的第一颗牙?