Whitening tooth

• 美白牙齿

Whitening tooth的用法和样例：

例句

1. Some people still prefer the age-old home remedy of baking soda and a toothbrush to gently whiten teeth at home.
   有些人还是喜欢古老的家庭自备方法来增白牙齿，如用小苏打轻轻刷牙美白牙齿。