Well, we start with a substrate that has a light-sensitive film on it.

我们从一个有一层感膜覆盖的基底开始。

He thought his plate wasn't cleaned properly.

他本以为感板没有擦洗干净。

Photographic paper is highly sensitive to light.

感纸（相纸）对十分敏感。

This area is covered with light sensitive cells known as cones.

这个区域被称为视锥细的感细所覆盖。

Doctors believe they need to fix one-tenth to one-third of the cells to repair vision.

医生认为，修复视修复十分之一至三分之一的感细。

He found a way to fix images by dipping paper into photosensitive chemicals and exposing it to light inside a camera obscura, which is essentially a dark room with a tiny hole in it.

他找到了一种修复图像的方法，将纸浸入感化学物质中，然后将其暴露在暗箱内的线，暗箱本质上是一个暗室，里面有一个小洞。

It damages those fine photoreceptors, which are used for sensing vision.

它损害了那些用于感知视觉的细感器。

We've got hundreds of millions of those light sensing cells in our eyes.

我们的眼睛里有上亿个感细。

Photons with wavelengths between 400-700 nanometers have the perfect level of energy to excite the rods and cones in your eyes, which then transmit signals to your brain that you interpret as different colours.

波长介于四百到七百奈米最能激起眼球中的感细，之后将信息传送于大脑，识别出不同颜色。

Compound eyes are made up of hundreds or even thousands of tiny light-sensitive units.

复眼是由成百上千个微小的可感的小眼组成的，每个细只能看到周围环境的一小部分。

The nanoparticles attach themselves to photoreceptors in the animal's retina.

纳米颗粒附着在动物视网膜上的感细上。

Photons with wavelengths between 400-700 nanometers have the perfect level of energy to excite the rods and cones in your eyes, which then transmit signals to your brain that you interpret as different colors.

波长介于四百到七百奈米之间，是最能激起眼球中的感细，之后将信息传送于大脑，识别出不同颜色。

Light sensitive cells in our retinas feed signals deep into that brain region, training neurons to sync up with Earth's 24 hour cycle of day and night.

我们视网膜中的感细？将信号输入大脑深处，训练神经元与地球昼夜24小时循环同步。

Bipolar neurons have synapses at both ends, forming a kind of bridge — on one end it synapses with a photoreceptor, and at the other, it synapses with a ganglionic neuron, which goes on to form the optic nerve.

双极神经元在两端都有突触，形成一种桥——在一端与感器突触，在另一端与神经节神经元突触，神经节神经元再形成视神经。

They most likely developed from a tiny light-sensitive patch on single-celled organisms that would help them move towards light in the hope of finding food.

它们很可能是从单细生物体上的一个微小的感斑块发展而来的，这个斑块可以帮助它们向移动，希望能找到食物。

The researchers taught a mouse to associate a sound with a shock and then pumped the engram cells, where they knew that memory lived, full of this light-sensitive protein.

研究人员教一只老鼠把声音和电击联系起来，然后给他们所知道的记忆存在的部位注入记忆印迹细，细中充满这种感蛋白。

But if that's true then this little guy may be our direct ancestor and those little cells may be the things that evolved, over hundreds of millions of years, into our eyes.

如果真是这样的话，那么皮卡虫就会是我们的祖先，而这些感细到了后来经过了数亿年的进化，变成了我们的眼睛。

And with a retina over one centimeters wide containing over a billion light receptors, this is a reptile that sees the world in high-definition.

而在它们一厘米宽的视网膜上包含了十亿个感细，在这只爬行动物眼中，世界是高清的。

The light-sensitive surface in a camera only has one kind of photoreceptor that is evenly distributed throughout the focusing surface.

相机中的感表面只有一种感受器，平均分布在整个对焦表面。

And he did that by building on a basic principle of photography: exposing a photosensitive material to light and then covering it in darkness.

将感材料暴露在线，然后将其覆盖在黑暗中。