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鱼需要喝水吗? – 译学馆
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鱼需要喝水吗?

Do Fish Drink Water?

如果你拥有一只宠物 你的工作之一就是确保你的宠物有大量的
If you have a pet, one of your jobs might be to make sure that your pet has plenty of
食物和水
food and water…
除非 当然的 你的宠物是一条鱼!
…unless, of course, your pet is a fish!
你必须得喂你的鱼 但你不用给它们水 它们
You have to feed your fish, but you don’t have to give them water — there’s water
周围可全是水!
all around them!
但是 鱼需要喝水吗?
But do fish need to drink that water?
一些鱼是需要 而有一些鱼是不需要的!
Well, some fish do, but some don’t!
这都取决于它们生长的环境
It all depends on where they live.
你肯定能知道你的身体什么时候需要水分-因为你的身体会传递信息给你
You probably already know that your body needs water—for lots of reasons!
这很重要 事实上 你身体的不同部分通力合作确保
It’s so important, in fact, that different parts of your body work together to make sure
在任何时候都有适当的水分
that there’s about the same amount of water inside of it at all times.
如果水分太低 你就会感到渴 去喝水
If the amount of water gets too low, you get thirsty, and grab a drink.
如果水分太多 你尿尿的时候就会排出多余的部分
And if the amount of water gets too high, you get rid of the extra when you pee.
好的 鱼也需要它们的体内有合适数量的水分
Well, fish also need to keep the right amount of water on the inside of their bodies.
而且一条鱼体外的水可以影响一条鱼是否需要喝水
And the water outside of a fish’s body can affect whether that fish needs to drink water, or not.
大多数鱼生活在两种水当中
Most fish live in one of two kinds of water.
一些被称作淡水鱼 生长在不含盐分的水中 比如
Some fish, called freshwater fish, live in places where there’s no salt in the water—
湖泊 池塘和河流中
like lakes, ponds, and rivers.
另一些鱼 被称作咸水鱼 生长在富含大量盐分的水中 比如海洋
Other fish, called saltwater fish, live in water that has lots of salt in it, like the ocean.
淡水鱼能更轻松的保持体内水分
Freshwater fish have an easier time keeping the right amount of water inside of their bodies.
那是因为水通过鱼的鳃进入鱼的身体当中
That’s because water enters into a freshwater fish’s body right through its gills.
鳃是鱼用来呼吸的部分
Gills are the body parts that fish use to breathe.
鱼通过在嘴中吸入水然后通过鳃将水排出体外的方式
Fish breathe by pulling water into their mouths, then pushing the water over their gills and
来呼吸
out of their body.
同时在淡水鱼类中 鱼腮也能让一些水进入鱼身并将其保存于鱼身内
And in freshwater fish, gills also end up taking in some of the water, and the fish
这样 鱼体内就有了更多的存留水分
ends up with more water in its body.
所以淡水鱼是不用像我们人类一样用嘴巴喝水的
So freshwater fish don’t really have to drink water through their mouths like we do.
实际上 这些淡水鱼必须要确保不能有过多水分 并且它们的身体
These fish actually have to make sure they don’t get too much water, and their body
要十分辛苦的活动才能让体内多余的水分作为废物排出
has to work very hard to get rid of the extra water as waste.
淡水鱼通过鱼鳃吸入水分 而咸水鱼
While freshwater fish get a lot of water in through their gills…saltwater fish lose
却用鱼鳃排出大量水分
a lot of water through their gills.
因为当水流过咸水鱼鱼鳃时 在咸水鱼体外水中的盐分
As water flows over a saltwater fish’s gills, the salt that’s in the water outside of
会通过鱼鳃带走部分其体内水分
the fish’s body sucks out some of the water that’s inside of the fish’s body through its gills.
因为水总在鱼的腮旁流动 这样意味着水分一直在
Since water is always moving over a fish’s gills, that means water is always leaving
从咸水鱼体内流失
a saltwater fish’s body.
这也意味着咸水鱼需要喝水-大量的水
And that means that the fish that live in saltwater need to drink—a lot.
多数动物不能在口渴时喝盐水 但是咸水鱼可以!
Most animals can’t drink salt water when they’re thirsty, but these fish can!
它们不断地吞水 吐水
They gulp and swallow water almost constantly.
咸水鱼体内有一个特殊的系统 能让它们自在地吸入或排出盐分
Saltwater fish have a special system in their bodies that takes salt and puts it back out
到大海中去……并且体内一切都能保持平衡
into the ocean…and everything stays in balance!
所以 一些鱼是需要喝水的 而有一些不需要……喝不喝取决于它们所生存的环境!
So, some fish need to drink water, and some don’t…it just depends on where they live!
感谢收看我们的 “儿童科学秀”
Thanks for joining us here on SciShow Kids!
如果有问题需要我们的帮助
Have a question for us here at the Fort?
请在成人帮助下 在节目下方留言或发送邮件到Kids@scishow.com
Grab a grownup and leave a comment down below, or send us an email to Kids@scishow.com!

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视频概述

为儿童制作的科学教育节目,旨在以趣味的图文和语言让儿童更科学地认识世界

听录译者

收集自网络

翻译译者

Yolo

审核员

vicky

视频来源

https://www.youtube.com/watch?v=LS8moIbGdnc

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