They have a freckle on their neck.

她们的脖子上有颗痣。

Remember it? What do you think this is, a freckle?

记得吗？你以为这是什么？雀斑啊？

Maybe, should we turn him into a freckle?

也许，我们应该把他变成雀斑吗？

Remember it? What do you think this is, a freckle?

记得？你想这是什么？雀斑吗？

My question is, why is there a freckle on my belly button?

我的问题是，为什么我的肚脐上有雀斑？

I mean, sometimes I put concealer on it and then literally you can make it into a freckle.

我的意思是，有时我在上面涂上遮瑕膏，然后你就可以把它变成雀斑。

[Rachel] Hi my name's Rachel. I live in Kensington, Maryland. I'm in second grade. My question is why is there a freckle on my belly button?

我的问题是为什么我的肚脐上有雀斑？

Those cells make tons of extra melanin to compensate and keep the skin protected from the UV rays, and all that extra melanin takes the form of a freckle.

这些细胞会产生大量额外的黑色素，以弥补皮肤色素不足，保持皮肤免受紫外线的影响，而这些额外的黑色素会以雀斑的形式出现。