It's a baby tooth.

这是一颗乳牙。

If it is a lower baby tooth, throw it up onto the roof;

在日本，如果掉的是下牙，就扔到房顶上去；

In Mongolia, they put the baby tooth in the meat and feed it to the young dog.

在蒙古，人们把乳牙放在小狗的狗食中。

Take your child to the dentist within 6 months of the first baby tooth and no later than their first birthday.

在第一颗乳牙出现后6个月内就应该带孩子去看牙医，最迟也不能超过孩子一岁。

Proof of this can be determined by dropping a baby tooth into a glass of it, then going back the next morning to find most of it eaten away.

我们来终结这个流言：将一颗牙齿仍在可乐玻璃杯里，第二天早上回来发现大部分被蚕食了。

Some women also confessed to carrying sentimental and comforting but hardly practical items, including a son's baby tooth, a daughter's first pair of shoes and their father's watch.

有些女人会带上一些没有实际用处的、却很重要的感情寄托，比如包包的乳牙、女儿的第一双鞋或者老爸的手表。

Most notably, girls who are born with a baby tooth already erupted through the gum and girls who are very ugly or have some facial disfiguration are believed to be possessed by ghosts.

那些天生就有龅牙的女孩，以及那些非常丑陋或是面部毁容的女孩都被认为是鬼上身了。

A single mother moves into a new house with her daughter. Soonafter the young girl has her first baby tooth fall off, she begins torecount that she is having nocturnal visits by a tooth fairy.

一位单亲妈妈带着自己的女儿搬进了新家，很快呢，小女孩的第一颗乳齿就掉落了，小女孩说晚上有牙仙来探访她，告诉了她这个新家似乎有一个不为人知的秘密。

It is a common myth that losing baby teeth due to tooth decay is insignificant because baby teeth fall out anyway.

这是常见的误区，认为宝宝因为蛀牙失去牙齿是无关紧要的，因为宝宝的乳牙总会在将来某一天脱落。

Whenever the first tooth peeks through, celebrate it by taking pictures and noting its arrival date in your child's baby book.

无论宝宝的第一颗小牙何时冒尖，最好当下给他拍照留念，并在宝宝日志里记录好小牙到来的时间。

"Yes, but my dentist said there are things I can do to keep my baby from getting tooth decay," said Maria.

“没错，但我的牙医说有的防止宝贝牙齿被侵蚀的事情我现在就可以开始做了，”玛丽亚说道。

Palmer notes that tooth decay in baby teeth can result in damage to the developing crowns of the permanent teeth developing below them.

Palmer指出婴儿牙齿蛀牙可能会损害它们下方的恒牙牙冠的生长。

The baby had put on five pounds and had cut his first tooth.

这个孩子已经长了五磅体重，还长了第一颗牙齿。

Developed in cooperation with dentists, Children's Tooth Gel is specially formulated to help maintain the health of baby teeth and keep the flora of the mouth in natural balance.

与牙医合作开发的产品，本牙膏的独特配方能够帮助维护宝宝的牙齿健康，保持口腔内的天然平衡。

The baby is out of sorts today. Perhaps he is cutting a tooth.

阿谁婴儿本日不太舒服，他大概正在长牙。

AIM: to study the risk factors of baby bottle tooth decay (BBTD).

目的：探讨引起婴幼儿猛性龋的危险因素。