The Tooth Fairy comes in the middle of the night after a child loses a milk tooth.

乳牙脱落后，牙仙会在夜半来到。

In parts of India, children wrap their milk teeth in cotton and offer it to the sun.

在印度的部分地区，孩子们会用棉花将乳牙包裹起来，并奉献给太阳。

When our milk teeth first appear in our infant years, we are shown, often by our parents, how to clean them – a ritual normally accompanied by some kind of catchy song.

当我们的乳牙在婴儿时期首次出现时，我们的父母通常会向我们展示如何清洁它们——这种仪式通常伴随着某种朗朗上口的歌曲。