When stretched horizontally, the pupils allow for more light to enter from the front, back, and sides.
当瞳孔横向伸展的时候，更多的光能够从前面、后面和侧面进入。
It has a lens system to focus light onto the film at the back of the camera.
它的镜片系统可以将光线聚焦到相机后部的胶片上。
When injected behind the retina at the back of the eye, the gene produces a protein that is sensitive to red light.
当这种基因被注射到位于眼睛后部的视网膜后面时，会生成一种能感应红色光的蛋白质。
If you have glasses you know that optically focus has to do with bringing the light to a focal point in the back of your eye.
如果您戴眼镜，您就会知道，从光学的层面理解，焦点的意思是，将光线汇聚到您眼底的一点上。
Some of this light would then travel back to the door and be reflected into the camera. That much is basic optics.
它不记录直接反射回来的光线，而是记录下在进入相机前被反射过多次的光。
In the frozen liturgy of the stained glass, the natural light of the sun enabled man to enrich its beauty and offer it back to God.
彩色玻璃凝固的礼拜仪式里，太阳的自然光线是人能够丰富它的美丽，并回奉与上帝。
The devices, which register depth and light every second, were taped to the lower back, so that they caused the least amount of drag.
这种可以每秒钟记录深度和光线的装置被固定在企鹅的背上，以将阻力减到最小。
Shoot facing your subject with your back to the light.
你要背向光线拍摄你的对象。
I saw some people carrying injured on their shoulders, then I went back home to pray and wait for the light.
我看到有人正在用肩膀搬运受伤的人。后来，我回到家祈祷，等待消息。
The fiber is internally reflective at specific points, so that when light is sent along the fiber, some of it bounces back to a detector.
在特定点上，纤维可以向内反射光线，当光线沿纤维传输时，部分会反射到探测器上。
Should Congress approve, such measures could light the path back to work for many jobless Americans.
如果国会也能批准这样的举措，就会为美国失业大军重回就业市场的艰辛之路带来曙光。
However, if you shine a laser at the surface of an object, the way the light is reflected back can be used to gather information about the same features.
然而，如果采用激光对物体表面进行照射，那么光线反射回来的方式能用来收集具有相同特征物体的信息。
Some of this light would then travel back to the door and be reflected into the camera.
其中一些光会向门这个方向反射回来并又被反射回相机中。
Be sure to be back in your rural idyll for sunset and then the evening light show; it can be dazzling, especially for those who live in a city.
确保太阳落山前回到你的田园生活中去，然后晚上的灯光表演就开始了，这个表演让人眼花缭乱，特别是对那些城市人。
If your woken from deep sleep but can go back into a light sleep, you will find it easier to wake from a light sleep.
如果你从深度睡眠中醒来了，但可以重新回到轻度睡眠中，你会发现从轻度睡眠中醒来更容易。
They just bounce back white light for the sun, right to your eyes.
它们只是把太阳里的白光反弹，以进入你的眼睛。
Someone standing outside with her back to bright sunlight will have light falling on her from the open sky in front of her.
如果一个人在户外，即使背景是明亮的阳光，正面也会有来自天空的光线照射。
The screen works by shining light upwards through the screen, which bounces back to a layer of sensors behind the screen.
该触屏电脑的工作原理是——电脑内部发出闪光穿透屏幕，遇到物体时再反射回电脑屏幕后的传感器。
Of course, that only came to light after we revealed some of the participating company names in a blog post back in April.
当然，这只是我们在一篇博客文章中透露了一些公司的名字后，这点真相才显露出来。
Or, your goal may include going back to school, entering a new career, or bringing your creative talents into a greater public light.
或者，你的目标可能是重新回到校园去学习，开始新的职业生涯，或是让公众也注意到你的天赋。
This is a city where the buildings are jammed together; the back alleys offer little natural light; and the elaborate entrances to palaces are visible only from small back canals.
在威尼斯，建筑物紧罗密布；太阳很少光顾这里的穷街陋巷；只有在狭小偏僻的运河处，才能看到各个宫殿设计精巧的入口。
Some of this light would then travel back to the door and be reflected into the camera.That much is basic optics.
它不记录直接反射回来的光线，而是记录下在进入相机前被反射过多次的光。
A person with his back to a bright window will have light reflected from an opposite wall falling on him.
如果一个人站在明亮的窗户前，对面的墙壁会反射部分光线落在人身上。
As I turned back around to see if I had cut off the kitchen light I saw the covered bird cage in the living room.
当我转过头去确认是否关上了厨房灯时，我看见了客厅里的那个盖着布的鸟笼。
Ice crystals should be plate shaped. They float in the air close to the ground reflecting light back downwards.
冰晶需呈片状，它们悬浮近在地面的空中，将光线向下反射。
Ice crystals should be plate shaped. They float in the air close to the ground reflecting light back downwards.
冰晶需呈片状，它们悬浮近在地面的空中，将光线向下反射。
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