牙齿teeth和tooth的区别
adobe air是什么
teeth
英 [tiːθ] 美 [tiːθ]
riddleaftooth 的复数
市场营销专业英语例句：对不起的英语怎么写
disableDraw the floss backwards and forwards between the teeth.
将牙线在齿间来回拉动。
The front cog has 44 teeth.
focus什么意思前齿轮有44个齿。
tooth
tobehonest
英 [tuːθ] 美 [tuːθ]
struggle on
n.牙;齿;齿状部分
复数： teeth
例句：mistral
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?
