(单词翻译:单击)
Squeaks and I are celebrating today.
吱吱和我今天在庆祝。
Because guess what?
因为你猜怎么着?
It’s almost National Coloring Day!
今天是全国涂色日!
National Coloring Day is just what it sounds like: a day to color and have fun.
全国涂色日就像它听起来的那样:一个涂色和玩乐的日子。
And that’s exactly what we’re going to do … with a special project.
这正是我们要做的…一个特别的项目。
We’re going to make some invisible ink!
我们要做一些隐形墨水!
That means the ink will disappear, and then you can color over it to reveal a secret message.
这意味着墨水将会消失，然后你可以在上面涂上颜色来显示一个秘密信息。
All you’ll need is baking soda, water, purple grape juice, two cups, a cotton swab like a Q-tip, and either a paint brush or a cotton ball.
你所需要的只是小苏打、水、紫葡萄汁、两个杯、棉签、油漆刷或棉球。
Oh, and a piece of white paper to write on, and a grown-up, of course!
哦，还有一张白纸，当然还有一个成年人!
The first thing we’ll do is mix a quarter of a cup of baking soda and a quarter of a cup of water.
我们要做的第一件事就是把四分之一杯小苏打和四分之一杯水混合。
The measurements don’t need to be exact — we’re just trying to make sure we have about the same amount of each.
测量不需要精确，我们只是想确保每个的量相同。
This baking soda-water mixture will be our ink!
这种苏打水混合物就是我们的墨水!
Yep, that’s all there is to it!
是的，就是这样!
Let’s write something on this paper here.
让我们在这张纸上写点东西。
Hmmm … let me think of a secret message for you, Squeaks … OK!
嗯……让我想一个秘密的消息给你，吱吱……
Now all we have to do is wait for it to dry, and the message will be hidden!
现在我们所要做的就是等待它变干，信息就会被隐藏起来!
It looks like the ink is dry, so the secret message is ready to be revealed!
看起来墨汁已经干了，所以秘密信息即将被揭露!
The question is, are you ready, Squeaks?
问题是，你准备好了吗吱吱？
Let’s do it, then!
那么，让我们开始吧!
This is what the grape juice is for.
这就是葡萄汁的作用。
We’ll dip the brush into the grape juice, and paint over the message.
我们把刷子蘸上葡萄汁，在上面涂上颜色。
Check it out!
来看看！
Science is awesome That was the message!
上面写着：“科学太棒了!”
There are lots of ways to make invisible ink at home, but this is one of the easiest — and, I think, the coolest!
有很多方法可以在家制作隐形墨水，但这是最简单的方法之一，而且我认为这是最酷的!
Because we’re doing the same thing lots of scientists do in their labs every day!
因为我们每天都在做很多科学家在实验室里做的事情!
No, they’re not writing secret messages.
不，他们不是在写秘密信息。
But they do mix things together to learn more about them, like we just did!
但是他们会把东西混在一起来了解更多，就像我们刚刚做的那样!
The baking soda we used to make the invisible ink is really a type of chemical called a base.
我们用来制造隐形墨水的小苏打实际上是一种叫做碱的化学物质。
And when we added the grape juice to the base on the paper, they reacted to each other!
当我们把葡萄汁加到纸的基底上时，它们相互反应了!
That means they changed.
这意味着他们发生变化了。
When it touched the baking soda, a chemical in the grape juice changed to become darker.
当它接触小苏打时，葡萄汁中的一种化学物质会变暗。
That’s why the parts of the paper where the message was got darker, and we were able to read it!
这就是为什么这篇文章中信息变暗的部分，我们能够读懂它!
Now, baking soda is a safe chemical, so we can cook with it and use it for experiments at home, but scientists use it in their labs sometimes, too.
现在，小苏打是一种安全的化学物质，所以我们可以用它做饭，在家里做实验，但是科学家有时也会在实验室里使用它。
Actually, scientists use all kinds of bases in their labs, and sometimes they need to be able to test if a chemical is a base.
事实上，科学家们在实验室里使用各种各样的碱基，有时他们需要能够测试一种化学物质是否是碱基。
To do that, they combine the chemical with something called an indicator.
为了做到这一点，他们把这种化学物质和一种叫做指示剂的东西结合起来。
That’s another chemical that scientists know will change color if it mixes with a base.
这是另一种化学物质，科学家们知道如果它与碱混合会改变颜色。
And guess what?
你猜怎么着？
One of the ingredients in grape juice works as an indicator!
葡萄汁中的一种成分起着指示作用!
It’s called an anthocyanin, and it becomes a darker purple color when it touches a base.
它被称为花青素，当它接触碱的时候就会变成深紫色。
That’s true, the grape juice is already purple!
没错，葡萄汁已经是紫色的了!
But when it touches a base like baking soda, it becomes a much darker purple.
但当它接触小苏打之类的碱时，就会变成深得多的紫色。
So that’s the scientific secret to our invisible ink.
这就是隐形墨水的科学秘密。
And now we can write all the secret messages to each other we want … as long as we have some grape juice on hand!
现在我们可以写所有我们想要的秘密信息，只要我们手头有葡萄汁!
Thanks for joining us!
感谢收看！
If you want to keep learning and having fun with Squeaks and me, hit the subscribe button.
如果你想继续学习并享受吱吱和我的乐趣，点击订阅按钮。
We’ll see you next time, here at the Fort!
我们下次见，就在这个堡垒!
