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  • At first glance, a kangaroo's pouch

    乍一看,袋鼠的袋子

  • looks like nothing but a built-in baby sling.

    看起來像什麼,但內置的嬰兒吊帶。

  • But if you peeked inside,

    但如果你偷看裡面。

  • you'd see it's far more complex than a simple pocket.

    你會發現這比一個簡單的口袋要複雜得多。

  • It has to be, because the joey inside

    一定是的,因為裡面的喬伊...

  • is not your average baby.

    不是一般的嬰兒。

  • An adult male red kangaroo can stand over

    一隻成年的雄性紅袋鼠可以站立於

  • 1 1/2 meters tall and weigh 90 kilograms.

    高1.5米,重90公斤。

  • That's larger than a grown man.

    這比一個成年男子還大。

  • But the newborns start out the size of jelly beans.

    但新生兒一開始的大小就像果凍豆一樣。

  • They're blind, deaf, and hairless to boot.

    他們是瞎子,聾子,沒有頭髮的引導。

  • After all, they only spend 33 days

    畢竟,他們只用了33天

  • inside their mom before birth.

    在他們的媽媽體內,在出生前。

  • That's like a human having a baby

    這就像人類生孩子一樣

  • when she's two months pregnant.

    當她懷孕兩個月的時候。

  • So the underdeveloped roo isn't ready to face

    所以,發育不全的大鵬還沒有準備好面對

  • the harsh Australian wilderness.

    嚴酷的澳洲荒野。

  • That's where the pouch comes in.

    這就是小袋的作用。

  • It's a pocket of skin that acts like a second womb,

    這是一個皮膚的口袋,就像第二個子宮。

  • giving the joey a safe, cozy environment to grow.

    給喬伊一個安全、舒適的成長環境。

  • And, like a pregnant belly,

    而且,像懷孕的肚子。

  • the pouch can stretch to fit the baby as it gets bigger.

    袋子可以拉伸以適應寶寶長大後的需求。

  • It's lined with powerful,

    它的內涵是強大的。

  • but flexible, muscles and ligaments.

    但靈活,肌肉和韌帶。

  • To keep the joey safe, mom can tighten those muscles

    為了保證喬伊的安全,媽媽可以收緊這些肌肉。

  • to shut the pouch flush against her body,

    要把袋子齊刷刷地關在她的身上。

  • just like pulling a drawstring bag closed.

    就像拉上一個拉繩包一樣。

  • And it will need the extra space,

    而且它將需要額外的空間。

  • because over the course of eight months,

    因為在八個月的時間裡,。

  • that bean-sized baby will reach the size

    豆大的孩子會長大

  • of a large house cat.

    的大型家貓。

  • That's thousands of times its birth weight.

    那是它出生體重的幾千倍。

  • That rapid growth is thanks to the pouch's four nipples,

    這種快速增長得益於小袋的四個乳頭。

  • which spout milk that contains germ-fighting antibodies

    含有抗病菌抗體的牛奶。

  • to keep the little roo from getting sick.

    以免小公雞生病。

  • But that's just the start.

    但這僅僅是個開始。

  • You see, the nutrient levels change

    你看,營養水準的變化

  • to meet the baby's needs as it ages.

    以滿足寶寶年齡增長的需求。

  • For example, sulfur, a major building block of hair,

    例如,硫磺,是頭髮的主要構成成分。

  • peaks around three months in.

    在三個月左右達到高峰。

  • That's the same time the baby starts growing fur.

    也就是寶寶開始長毛的時候。

  • The best part?

    最精彩的部分?

  • Mom can produce multiple types of milk at the same time,

    媽媽可以同時生產多種類型的牛奶。

  • each squirting from its own nipple.

    每個人都從自己的乳頭噴出。

  • So she can suckle two babies

    這樣她就可以給兩個孩子餵奶了

  • in different age groups simultaneously.

    在不同年齡段同時進行。

  • Another special feature about the kangaroo pouch

    袋鼠袋的另一個特色是

  • is that it's lined with sweat glands

    是,它的內側有汗腺。

  • that release antimicrobial substances,

    釋放抗菌物質的。

  • which help protect the baby roos

    這有助於保護小公雞

  • from harmful viruses, bacteria, and parasites.

    不受有害病毒、細菌和寄生蟲的侵害。

  • But there's one more way that pouch's design

    但是,還有一種方式,小袋的設計。

  • keeps the joey safe.

    確保喬伊的安全。

  • It's totally hairless, and that skin-to-skin contact

    它完全沒有毛髮,而且皮膚與皮膚之間的接觸。

  • keeps the baby warm and cozy.

    讓寶寶溫暖舒適。

  • Basically, it's the ultimate nursery.

    基本上,它是終極的幼兒園。

  • But nothing lasts forever.

    但沒有什麼是永遠的。

  • Eventually, the joey will need to leave the pouch.

    最終,喬伊將需要離開這個袋子。

  • At about 5 months old, it pokes its head out.

    在5個月左右的時候,它就會把頭探出來。

  • And a month later, it takes its first tentative

    而一個月後,它第一次試探性地。

  • steps into the world.

    步入世界。

  • There, it will explore for a few short seconds

    在那裡,它將會探索幾秒鐘的時間

  • before high-tailing it home.

    才高高興興地回家。

  • But as it gets older and bolder, it stays out longer,

    但隨著年齡的增長,膽子也越來越大,在外面呆的時間也越來越長。

  • until eight months in:

    直到八個月後。

  • It's ready to leave the nest, well, the pouch, for good.

    它已經準備好離開巢穴了,嗯,是離開袋子,永遠離開。

At first glance, a kangaroo's pouch

乍一看,袋鼠的袋子

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B2 中高級 中文 喬伊 袋子 寶寶 皮膚 增長 公雞

袋鼠的袋子裡有什麼? (What’s Inside A Kangaroo’s Pouch?)

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    林宜悉 發佈於 2020 年 10 月 23 日
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