Name: 響尾蛇的尾巴里有什麼？ (What's Inside A Rattlesnake's Tail?)
Uploaded: 2020-10-23T20:41:03.000Z
Duration: 3 min 3 s

程度副詞

If you're hiking pretty much anywhere in the US,

如果你在美國幾乎任何地方徒步旅行。

this is one sound you don't want to hear.

並不意味著它的工作方式像一個。

There are no beads rattling about in here.

If you opened up a rattlesnake's rattle and shook it,

如果你打開響尾蛇的撥浪鼓，然後搖動它。

Tim Colston: So, rattlesnake rattles are hollow.

蒂姆-科爾斯頓所以，響尾蛇的響聲是空心的。

Narrator: That's herpetologist Tim Colston.

旁白：那是爬行動物學家Tim Colston.

He says the secret to that rattling sound

the same hard substance as your fingernails.

The keratin is arranged in a chain of interlocking rings,

角蛋白以連鎖的方式排列，環環相扣。

which are hooked together by tiny grooves along their edge.

現在，看看那些戒指會發生什麼吧

Colston: Whenever I shake them very fast,

科爾斯頓每當我搖晃他們非常快。

它們碰撞在一起，產生了聲音。

Narrator: Because the rattle is hollow inside,

sound waves can bounce off the walls and echo,

聲波可以從牆壁上反彈併產生回聲。

the same way shouting in a cave amplifies the sound.

就像在山洞裡大喊大叫會放大聲音一樣。

And the bigger the cave, or hollow rings in this case,

而且是越大的洞穴，也就是這裡的空心環。

the more amplification, so the louder the rattle.

But a big, hollow chamber can't get the job done on its own.

但一個大而空的腔體是無法獨立完成任務的。

Rattlesnakes are equipped with three powerful shaker muscles

響尾蛇擁有三塊強大的甩尾肌肉。

they vibrate the rattle up to 90 times a second.

It turns out, that tail is custom designed

(yes, that's what baby snakes are called),

I don't know if you can see, that's on the end here.

不知道你看不看得到，那是在這頭。

Narrator: Without a second button to clack against,

旁白：沒有第二個按鈕可以抵擋

they add another button to the base of the rattle,

他們在撥浪鼓的基礎上又增加了一個按鈕。

sort of like the structure of a Russian stacking doll.

有點像俄羅斯堆積娃娃的結構。

The rattle will keep growing until...snap!

撥浪鼓會不斷壯大，直到......啪啪啪!

and they can break off if they get too long.

而且如果太長的話，它們會斷掉。

In fact, the rattles rarely make it past eight to 10 rings

事實上，響聲很少能超過8到10環

幸運的是，蛇的一生都在蛻變。

So the rattle will grow back good as new,

這對你們徒步旅行者來說是個好消息。

because that handy tail can mean the difference

因為那條方便的尾巴可以決定一切

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響尾蛇的尾巴里有什麼？ (What's Inside A Rattlesnake's Tail?)

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