A mole rat's incisor teeth can move on their own, working together like chopsticks.

鼹鼠门牙可以自行移动，像筷子一样共同工作。

These teeth grow continuously through their lives so that they never become worn down, despite being used to gnaw on wood.

门牙会终生持续生长，使其永远不会因啃咬木头而受损。

For example, how much would you have to be paid to have one upper front tooth pulled out? Or how much would you have to be paid to have one little toe cut off?

比如，给多少愿意拔掉自己一颗门牙，或者给多少愿意砍掉一根小脚趾？

Die. Then the front of the tongue arches towards the front of the roof of the mouth while the tip of the tongue stays down behind the bottom front teeth. Die。

然后舌头前部向上颚前部抬起，同时舌尖停留在门牙根部。

Oh, wow! Look at these really big front teeth, here and here.

哦, 哇! 看看这些巨大门牙，这里和这里。

Squirrels have four front teeth that grow for their entire lives.

松鼠有四颗门牙，它们一生都在生长。

There's options for fixing chipped front teeth.

修复门牙缺损方法有很多。

I think you will have two front upper teeth soon.

想很快就会有两颗在上面门牙。

With an f consonant sound, as in 'fork', and 'from' and 'fry' the lower lip touches the underside of the upper front teeth but loosely, so there's a little bit of space through which the breath travels.

以 f 辅音发音，如“fork”，“from”和“fry”，下唇接触上门牙下侧，但很松，所以有一点空间让呼吸通过。

We have four of them in our upper jaw and four in our lower jaw.

八颗门牙分别是上颚有四个，下颚有四个。

The front teeth are dagger-shaped with serrated edges designed to tear flesh.

门牙形如匕首边缘呈锯齿状，用以撕咬血肉。

Who would've thought Mom and Teddy Roosevelt were identical front-teeth twins?

谁会想到妈妈和泰迪·罗斯福[前总统]门牙都长得一样呢？

Manatees have no front teeth. They don't need them because they don't eat meat.

海牛没有门牙。它们不需要门牙，因为它们不吃肉。

And last, but certainly not least, was Ava… with her two, big front teeth.

最后，但肯定不是最不重要，是艾娃… 她两个大门牙。

This R is made with a flap of the tongue on the ridge behind the front teeth, that's not too far away from where the L is pronounced.

这个 R 音是由舌头在门牙后面舌尖上拍动而成，离 L 发音位置并不远。

The paper reports that “the common finding was a narrowing of the mandibular dental arch and a decrease in maxillary arch length, causing an incisor cross-bite.”

“最普遍情况是下颌牙弓变窄，上颌弓内缩，从而导致门牙反咬合。”

They thought it was neat until my husband taught them how to rinse by spitting out water between their two front teeth like a fountain.

他们认为那样刷很好玩，直到有一天先生教他们如何漱口——从两颗门牙之间把水像喷泉一样喷出来，他们认为这叫做好玩。

He had a long chin and big rather prominent teeth, just covered, when he was not talking, by his full, floridly curved lips.

长长下巴，相当突出大门牙，不说话时两片嘴唇勉强能包住，嘴唇丰满，曲线好看。

Leonard, have you ever wondered why my little toes and lateral incisors are significantly smaller than the average for someone of my size?

兰纳德想过为啥小脚趾和侧门牙要比和一号人小很多吗？

He informed me that he was the one who had knocked out my front teeth when I was first brought to the ward.

他告诉，当第一次被送到病房时，就是他打掉了门牙。