Children don't complete their set of 20 baby teeth until they are two to three years old.

孩子到两三岁时才长齐20颗乳牙。

Are those just your baby teeth?

那些不就是你的乳牙么？

Should sealants be put on baby teeth?

乳牙也应该涂保护胶吗？

Natural protection for children's baby teeth.

儿童乳牙的天然保护。

I never realized that baby teeth are so important.

我过去一直没有认识到乳牙是这么重要。