When the food is swallowed, it goes into a kind of little mill called the " gizzard. "

食物咽下去之后, 会进入一个工厂, 名叫" 砂囊" （gizzard）。

The gizzard is a strong bag. It is nearly full of stones and gravel which the fowl has swallowed.

砂囊是一个强壮肌肉构成袋子, 里面几乎盛满了鸡吞下去石头和沙砾。

Some birds have VERY strong gizzards that can even break down small pieces of steel!

有些鸟砂囊非常坚固， 甚至可以分解块钢铁！

That's meat. That's mince is it? You're not grinding up gizzards for us are you?

那是肉。 那是肉吗？ 你不会给我们磨砂浆吧？

And fossils also revealed that birds started to have fewer teeth after they developed gizzards.

化石还显示，鸟类 在长出砂囊后牙齿开始减少。

He thought plainly that the gizzard had not been removed.

他明明白白地认为砂囊没有被去除。

The gizzard is a small pouch that has a lot of muscle.

砂囊是一个有很多肌肉囊。

Fred Tompkins once cooked a coot liver and gizzard pilau at the Creek.

弗雷德·汤普金斯 (Fred Tompkins) 曾经在 (Creek) 过白骨肝和砂胗肉饼。

Yeah it didn't taste bad. The taste was fine, it was just the idea of eating a gizzard.

是，味道不错。味道还行，就是吃个肫意念。

So with the advent of gizzards at least 120 million years ago, the need for teeth started to fade.

因此，随着至少 1.2 亿年前砂囊出现，对牙齿需求开始减弱。

Inside the stomach, there is a special part called a " gizzard" .

胃里面有一个特殊部分， 叫做“砂囊” 。

It's called a gizzard and it's a really important body part for turkeys and other birds.

它叫做砂囊，是火鸡和其他鸟类非常重要身体部位。

The gizzard is filled with sand and small stones that break down food into very small pieces.

砂囊里充满了沙子和石头， 可以将食物分解成很碎片。

A Turkey's gizzard is full of tiny stones and pieces of other hard things like gravel.

火鸡砂囊里装满了石头和其他坚硬东西，比如砾石。

But for a turkey the stones in its gizzard act like teeth.

但对于火鸡而言，砂囊中石头就像牙齿一样。

And if we could see inside of the turkeys body, we could see that the gizzard is right here.

如果我们能看到火鸡身体内部，我们就能看到砂囊就在这里。

And like the word gizzard they're also pretty fun to say.

就像 gizzard 这个词一样，他们说起来也很有趣。

The turkey picks up these hard pieces from the ground and swallows them and they stay in a gizzard.

火鸡从地上捡起这些硬块并吞下，它们留在砂囊里。

Gizzards are a muscular part of the stomach where, with the help of swallowed pebbles, birds can grind up their food.

砂囊是胃肌肉部分，在吞下鹅卵石帮助下，鸟类可以在其中磨碎食物。

When food gets into the gizzard, the muscles of the gizzard squeeze it, mixing the food with the stones inside.

当食物进入砂囊时，砂囊肌肉会挤压它，使食物与里面石头混合。