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跳蚤为何有惊人跳跃能力 – 译学馆
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跳蚤为何有惊人跳跃能力

A Flea's Fantastic Jump Takes More Than Muscle | Deep Look

Sometimes, to get where you want in life, you need to go all out.
有时你需要全力以赴以到达向往的地方
Fleas need to get off the ground and on to someone they can exploit.
跳蚤必须跳离地面去依附在能被它们利用的动物身上
That’s a bad news If you got fur or feathers.
这对有毛或羽毛的物种来说是个不幸的消息
There are more than 2000 flea species.
现存两千多种跳蚤
Each partial to its own kind of creature.
每种跳蚤都有自己依附的物种
But the one you’ll most likely cross paths with is the cat flea.
但最有可能碰见的跳蚤就是猫栉头蚤
Fleas are one of nature’s greatest jumpers
跳蚤是自然界中顶级的跳跃者之一
taking a gigantic leap almost too fast to comprehend.
它们做一个飞跃几乎快得让人无法察觉
They’re small and narrow — like a little sesame seed with legs.
它们又小又窄 就像是长了腿的小芝麻
Their fly ancestors lost their wings millions of years ago
数百万年前它们会飞的祖先脱去了它们的翅膀
to help them slip through fur with ease.
来帮助它们在皮毛中轻松穿行
Fleas are tough to get rid of.
跳蚤很难被清除
Stiff backwards-facing hairs catch on fur when you try to pick them out.
当你想要把它们抓出来时 向后的硬毛会粘在毛皮上
Try to squish one?
试试去挤死一只?
Nope!
没门儿!
Their flexible bodies are armored with rugged plates called sclerites.
它们灵活的身体表面附有叫做骨片的坚硬外壳
Adult fleas only eat one thing– blood.
成年跳蚤只吃一样东西 就是血
This cat flea prefers cat blood.
猫栉头蚤更爱喝猫血
But in a pinch, it’ll latch on to you too.
但在必要时 它也会附着在你身上
They lay eggs that drop from the cat’s body into its bedding.
它们在猫身上产的卵掉到猫窝里
A few days later, they hatch,
几天后卵开始孵化
and worm-like larvae wiggle out.
虫形幼虫扭动身躯挣脱出来
The hungry larvae scavenge for food.
饥饿的幼虫寻找食物
Their favorite meal comes from mom and dad.
它们最爱的食物来自父母
Adult flea poop — that’s just semi-digested blood.
就是成年跳蚤的粪便 也就是未消化完的血
Now, who could turn that down?
谁又能拒绝这个呢?
The larva curls up into a cocoon
幼虫蜷曲成蛹
it makes from whatever dirt, sand or other materials it finds nearby.
蛹茧由泥土 沙子等 就地可寻的任何材料制成
A few days later
几天以后
Voila! All grown up.
看呐!全都长大了
Now this hungry flea needs a warm body to call home.
现在饥饿的跳蚤需要一个温暖的身体当家
Its jump is super fast:
它跳得极快
100 times faster than the blink of an eye.
比眨眼的速度快一百倍
But it takes more than muscle to move that fast.
但跳这么快不只是依靠肌肉
The flea can compress itself like a spring,
多亏了腿部和体部的弹力蛋白质——节肢弹性蛋白
thanks to a rubbery protein called resilin in its legs and body.
跳蚤可像弹簧一样自我压缩
First the flea pulls in its over-sized rear legs and locks them in place.
首先跳蚤把长长的后腿缩回并保持不动
It squeezes and flattens its body,
它绷紧身体 贴近地面
squishing the resilin and building up energy for the jump… then…
压缩节肢弹性蛋白并为跳跃积蓄能量 然后……
it releases the energy all at once.
突然释放所有能量
The flea tumbles through the air, legs extended.
跳蚤伸长腿在空中翻滚
With a lot of effort and a little luck, it’ll land on its target
努力再加上一点运气 它会落在目标上
and the whole incredibly itchy cycle will begin again.
开启一轮引发极度骚痒的循环
Hi Deep Peeps. Lauren here.
嗨 观众们 我是Lauren
You may have noticed a different – but familiar – voice on our episode today.
你可能在今天的视频中注意到了一个不同但很熟悉的声音
My good friend and fellow science reporter Laura Klivans is back to take over for me
我的好友和科学报道者Laura Klivans
as the new official Deep Look host.
将接替我成为《微观深望》的新主持人
Here’s a playlist of our 10 Deep Look episodes she’s already hosted.
这里列出她已经主持过的十集《微观深望》
Thanks, Lauren! I’m thrilled to be back.
谢谢Lauren!我非常激动能够回来
If you miss Lauren’s voice – you can follow her now over at NPR
如果你想念Lauren的声音 你可以在NPR上关注她
where she’s the new climate science reporter. Link is in the description.
她是那里的新气象科学记者 链接就在视频中
Thanks.
感谢您的观看

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视频概述

本文介绍了跳蚤的习性 生命周期 以及为何善于跳跃

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视频来源

https://www.youtube.com/watch?v=A5KvNcNz9aQ

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