发音不相同,three发音是[θriː],意思是三、三个,teeth发音是[tiːθ],意思是牙齿,例如:

1、Draw the floss backwards and forwards between the teeth.将牙线在齿间来回拉动。

2、The front cog has 44 teeth.前齿轮有44个齿。

3、I need to have two teeth filled.我有两颗牙要补。