This is what differentiates between a single eyelid (monolid) and a double eyelid.

这就是单眼皮和双眼皮的区别。

The eyes of a dragonfly consists of 20,000 tiny telescopes packed together.

蜻蜓的眼睛由20万微小的单眼排在一起构成。

You will notice that many Asian people have the puffy eyelid look combined with a monolid.

你可能觉得洲人都是单眼皮并且眼睑有点浮肿。

Hey, you guys, look. The one-eyed jack follows me wherever I go.

大家快看 单眼杰克的眼睛一直跟着我。

Its single eyes stared at me.

它的单眼盯着我。

While observing young monocle breams in waters off Indonesia, scientists  noticed the fish exhibit rather unusual behavior.

在印度尼西附近海域观察年轻的单眼鲷时，科学家们注意这种表现出相当不寻常的行为。

I can also do the Demi Moore single tear-- left eye or right eye-- if that's better for the character.

我还能像黛咪·摩尔那样单眼流泪凡是为了剧情需要 左右眼都可以。

Now this same morning the Wicked Witch came to the door of her castle and looked out with her one eye that could see far off.

这天早晨，西方女巫堡的门口，用她的单眼四处望着，瞭望远处。

Plaques around the optic nerve causes loss of vision in one or both of the eyes because of damage to the optic nerve, which is called optic neuritis.

视神经周围斑块造成视神经损伤（视神经炎），导致单眼或双眼视觉缺失。

Keep in mind your eyes can change with time so it is not uncommon - for example to start with single eyelids that slowly change into double eyelids.

记住，人的眼睛是会随着时间推移而变化的，因此，单眼皮逐渐变成双眼皮这样的例子并不奇怪。

The next solution I want to point out is a little less common but comes up in contact lenses or LASIK surgeries, and it's called monovision.

我想指出的下一个解决方案不太常见，但出现在隐形眼镜或 LASIK 手术中，它被称为单眼视。

When I lived in South Korea, I heard my Korean coworkers, when they were speaking in English, I heard them use the terms, mono lid and double eyelid in their English conversations.

当我住在韩国的时候，我的韩国同事用英语交谈时，我听他们在英语对话中使用单眼皮和双眼皮这两个术语。

So if you were to have a conversation with someone in English and you said, yeah, he has a mono lid or a double eyelid, most other people in the Western world are not familiar with this concept.

所以如果你用英语和某人交谈，你说，是的，他是单眼皮还是双眼皮，大数西方国家的人都不熟悉这个概念。

SABRINA IMBLER: When the scientists published the paper on the monocle bream, they called  their behavior " novel." And it was, in the sense that humans had never observed it before, but had we even thought to look?

SABRINA IBLER：当科学家发表有关单眼鲷的论文时，他们称其行为“新颖”。从某种意义上说，人类以前从未观察过它，但我们有没有想过去看看？