易混淆的单词： Teeth

Bad teeth can be painful -- and worse .

坏牙会很痛乃至更糟。

His israeli opponents on the left are gritting their teeth .

他在以色列国内的左翼反对党者们牙关紧咬。

Scientists say the diet of prehistoric humans probably required more chewing teeth .

科学家们表示，史前人类的饮食可能需要更多咀嚼齿。

They are actually baring their teeth .

但实际上，他们只是不想露牙而已。

Or you look in the mirror and your teeth are all missing .

抑或你一照镜子发现你的牙全都不见了。