ADM-201 dump PMP dumps pdf SSCP exam materials CBAP exam sample questions

袋鼠的袋里有什么 – 译学馆
未登陆,请登陆后再发表信息
最新评论 (0)
播放视频

袋鼠的袋里有什么

What’s Inside A Kangaroo’s Pouch?

At first glance, a kangaroo’s pouch
乍一看 袋鼠的口袋
looks like nothing but a built-in baby sling.
就是一个内置的婴儿吊带
But if you peeked inside,
但如果偷看一下育儿袋
you’d see it’s far more complex than a simple pocket.
你会发现它远比普通口袋复杂的多
It has to be, because the joey inside
袋鼠的口袋不得不进化成这样
is not your average baby.
因为袋内的小袋鼠不像一般的婴儿
An adult male red kangaroo can stand over
一只成年雄红袋鼠可以达到
1 1/2 meters tall and weigh 90 kilograms.
1.5米高 90千克重
That’s larger than a grown man.
比一个成年男子还要高大
But the newborns start out the size of jelly beans.
但是刚出生的小袋鼠只有糖豆大小
They’re blind, deaf, and hairless to boot.
它们既看不见也听不见 还光秃秃没有毛
After all, they only spend 33 days
毕竟 它们出生前
inside their mom before birth.
只在母亲体内呆了33天
That’s like a human having a baby when she’s two months pregnant.
这就好比一个人类妈妈怀孕两个月就把孩子生出来
So the underdeveloped roo isn’t ready to face
所以 未发育完全的小袋鼠还没准备好
the harsh Australian wilderness.
面对严酷的澳大利亚野生环境
That’s where the pouch comes in.
这时候袋鼠的口袋就有用了
It’s a pocket of skin that acts like a second womb,
这个皮肤做的口袋就像第二子宫
giving the joey a safe, cozy environment to grow. And,
给了小袋鼠安全舒适的成长环境
like a pregnant belly,
就像怀孕的肚子一样
the pouch can stretch to fit the baby as it gets bigger.
袋鼠育儿袋可以随着幼崽的长大而变大
It’s lined with powerful, but flexible, muscles and ligaments.
袋子由有力而灵活的肌肉和韧带构成
To keep the joey safe, mom can tighten those muscles
为保证幼崽的安全 袋鼠妈妈会绷紧肌肉
to shut the pouch flush against her body,
让袋子裹紧小袋鼠
just like pulling a drawstring bag closed.
就像拉紧束口袋的绳子一样
And it will need the extra space,
不过它也要额外的空间
because over the course of eight months,
因为在接下来的八个月中
that bean-sized baby will reach the size
豆子大小的幼崽将逐渐长大
of a large house cat.
达到家猫大小
That’s thousands of times its birth weight.
变为它出生时体重的几千倍
That rapid growth is thanks to the pouch’s four nipples,
如此飞速的成长得益于袋内的4个乳头
which spout milk that contains germ-fighting antibodies
这些乳头可以产出含有抗菌抗体的奶水
to keep the little roo from getting sick.
以此避免小袋鼠生病
But that’s just the start.
但这仅仅是个开始
You see, the nutrient levels change
要知道 奶水中的营养成分
to meet the baby’s needs as it ages.
会随着幼崽成长阶段的不同需求发生改变
For example, sulfur, a major building block of hair,
例如 头发的主要成分硫
peaks around three months in.
会在三个月左右达到峰值
That’s the same time the baby starts growing fur.
这和幼崽开始长毛的时间相吻合
The best part?
最棒的功能是什么?
Mom can produce multiple types of milk at the same time,
袋鼠妈妈可以同时产出多种类型的奶水
each squirting from its own nipple.
并将它们从相应的乳头中喷出来
So she can suckle two babies in different age groups simultaneously.
这样她就可以同时哺育两个不同年龄段的幼崽
Another special feature about the kangaroo pouch
袋鼠育儿袋的另一个特点在于
is that it’s lined with sweat glands
它的内部遍布汗腺
that release antimicrobial substances,
这些汗腺会释放抗菌物质
which help protect the baby roos
有助于保护小袋鼠
from harmful viruses, bacteria, and parasites.
免受病毒 细菌和寄生虫的侵害
But there’s one more way that pouch’s design
同时 育儿袋的设计还有另一个
keeps the joey safe.
保证小袋鼠安全的用途
It’s totally hairless, and that skin-to-skin contact
育儿袋完全无毛 所以皮肤间的直接接触
keeps the baby warm and cozy. Basically,
可以保证幼崽的温暖舒适
it’s the ultimate nursery.
因此 这基本上是一个顶级育儿所
But nothing lasts forever. Eventually,
但没有什么是永恒的
the joey will need to leave the pouch.
终有一天 小袋鼠得离开育儿袋
At about 5 months old, it pokes its head out.
5个月左右时 它会把头伸出育儿袋
And a month later, it takes its first tentative
再过一个月 它会向世界
steps into the world. There,
跨出试探性的第一步
it will explore for a few short seconds
随后 它将探索几秒钟
before high-tailing it home.
然后调头钻回育儿袋
But as it gets older and bolder, it stays out longer,
但随着它长大 胆子变大 它也将在外越待越久
until eight months in:
直到八个月后
It’s ready to leave the nest, well, the pouch, for good.
它就可以完全离开育婴袋了

发表评论

译制信息
视频概述

袋鼠作为最典型的有袋动物,靠一个大袋子养大孩子。这样神奇的育儿袋里究竟有些什么呢?

听录译者

收集自网络

翻译译者

傻奶糕瀚宇Kido

审核员

审核员BZ

视频来源

https://www.youtube.com/watch?v=CmTovo7kyIM

相关推荐