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。

《柯林斯英汉双解大词典》

Baby lion lost his teeth.

小狮子丢失了他的牙齿。

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In 1958 scientists in st Louis began a campaign to collect baby teeth to study the link between above-ground testing and human exposure.

1958年，圣易路斯的科学家们就开始收集婴儿的牙齿以研究地面试验与人类接触之间的联系。

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Parents often wonder what effect thumb sucking or sucking on a pacifier might have on their baby's teeth.

VOA: special.2009.03.11

But dentists say a baby's gums and early teeth should be cleaned after each feeding.

VOA: special.2009.03.11

When baby teeth begin to appear, you can clean them with a wet toothbrush.

VOA: special.2009.03.11

The reality is, "baby teeth" need to stay put well beyond infancy and the toddler years.

CNN: Baby's teeth: What you should know

"In fact, some of those baby teeth are still in place when the child goes to middle school, " says Largent.

CNN: Baby's teeth: What you should know

Alexis Roman Cruz's parents had set up a six foot tall glass cabinet in their living room filled with his military metals, his childhood toys, even his baby shoes and baby teeth.

NPR: Grief, and Warmth, Among Soldiers' Families in Puerto Rico