Look at the shell, the protocol, which at the moment the shell is still very thin.

看殼，協議，目前殼還很薄。

That's because the snail hasn't eaten lots of food with calcium in it yet to make the shell hard.

那是因為蝸牛還沒有吃到很多含鈣的食物，使殼變硬。

And can you see the slippery mucus underneath the baby snails body?

而且你能看到小蝸牛身體下面滑溜溜的黏液嗎？

When something slippery, we say that it has less friction a bit like this.

當東西滑的時候，我們說它的摩擦力小一點是這樣的。

If I rub my hands together, friction stopped them from moving too quickly.

如果我的手揉在一起，摩擦力就會阻止它們移動得太快。

But if I add some hand lotion, look, the slippery lotion makes it much easier to move them back and forward, just like the snail's foot and the slippery mucus help the snail to move forward.

但是，如果我加上一些手乳，你看，滑溜溜的手乳讓它們更容易前後移動，就像蝸牛的腳，滑溜溜的黏液幫助蝸牛前進。

But to understand how the foot and the mucus work together, I think we should use one of my special cameras.

但要了解腳和粘液是如何一起工作的，我想我們應該使用我的一個特殊相機。

Chris has put a garden snail on a clear sheet, and I've attached this to my special camera.

克里斯把一隻花園蝸牛放在了一張透明的紙上，我把這個貼在了我的專用相機上。

It's called a pro blends, and it's going to help us see underneath that the snail's foot in more detail.

這叫專業調配，它將幫助我們更詳細地看到那蝸牛腳下的情況。

Okay, Chrissy Wow, that is all of the mucus, and I can see it there.

好吧，Chrissy 哇，那是所有的粘液，我可以看到它在那裡。

Oh, it makes the surface slippery, so it's easier for the snail to glide along.

哦，這讓表面變得很滑，所以蝸牛更容易滑行。

Oh, this is incredible.

哦，這是不可思議的。

Mhm.

嗯

Mm hmm.

嗯哼。

Mhm.

嗯

But a snail needs more than mucus to move.

但蝸牛移動時需要的不僅僅是黏液。

Can you see the snail's body ripples as it moves forward?

你能看到蝸牛前進時身體的波紋嗎？

Those ripples are the snails.

那些漣漪就是蝸牛。

Mussels working to help it move.

河蚌努力幫助它移動。

The snail is squeezing and relaxing its muscles over and over.

蝸牛在不停地擠壓和放鬆自己的肌肉。

Wow, Watch more on BBC I player.

哇，在BBC I播放器上看更多。