The whole fixture must be replaced—light source and luminaire—and this is never an inexpensive proposition.
整个装置——光源和灯具——必须换掉，而这一提议绝不便宜。
The light source must therefore be immensely brighter if it is to be used as a headlight to illuminate the path, than if it is to be used as a signal to others.
与用作被人识别的信号相比，如果用作照亮路途的头灯的话，光源必须要明亮很多。
Step 7: Look at a light source.
第7步：注视一个光源。
This is a light source people will want.
这会是一种人们想要的光源。
Ozcan USES an LED as his light source, creating cellular shadows.
欧兹坎用LED(发光二极管)作为光源，以此制造细胞的阴影。
I also had fun doing the background and setting up the light source.
我也喜欢研究背景和布置光源。
You can still make your light source bigger by using a simple bounce card.
你仍然可以使用简单的反光片来改变光源大小。
Ambient reflection: The light that is reflected by an ambient light source.
环境反射：由环境光源反射的光线。
In the simple diagram below, we can see that the light source is coming from the left.
下图中，光源来自左方。
One solution is to use a diffuse light source rather than a laser beam, says Mr O'Brien.
一个解决方案就是使用漫反射光源而不是激光，O'Brien先生说。
Diffusion scatters light, essentially making the light source broader and therefore softer.
运用漫散射分散光线的实质还是使光源变广，从而达到柔化光线的目的。
Whether in a controlled or natural environment, the light source is an essential consideration.
无论是在人工控制还是自然条件下，光源都是个必要考虑因素。
The size of your light source, relative to your subject, affects the overall look of the picture.
光源与被摄体的相对大小，决定了照片的整体效果。
Highlights can help balance shadows and should be used on the edges of objects closest to the light source.
高光能平衡阴影，应该位于物体靠近光源的边缘。
Here you have a light source at the bottom and here you have a screen with two slits in it, very small slits.
你们可以在底部看到光源，在屏幕上有两条缝，很细的缝。
A broad light source lessens shadows, reduces contrast, suppresses texture. A narrow light source does the opposite.
广泛的光源能够弱化阴影、降低对比、抑制纹理，较窄的光源则作用相反。
In the video, photographer Joe Edelman demonstrates the difference lighting makes, using only a single light source and an ordinary egg.
在视频中，摄影师JoeEdelman展示了不同的光线如何影响物体，所使用的不过是一个非常简单的光源和一枚普通的鸡蛋。
This is generally because a larger light source will create a smoother transition between light and shadow, or what you might call softer light.
大光源就是所谓的柔光，也就是亮部与阴影之间的过渡比较柔和。
The primary application for the diode laser bar is as a pump light source for use in solid-state lasers for medical and industrial applications.
半导体激光器主要用做医用和工业用固体激光器的光源泵。
The light source will most likely determine where the highlights and shadows fall (although with Web design you can afford to bend these rules in places).
光源位置决定了高光和阴影的位置（不过在网页设计中你能打破这些规则）。
The screen is the same size as Kindle 1.0 -a legible 6-inch monochrome e-ink display that requires an external light source to view -just like a paperback.
新产品的屏幕跟Kindle 1.0的一样大小，约为6英寸，使用清晰的单色电子墨水显示，像平装书籍一样，需要外部光源才能看得清楚。
The screen is the same size as Kindle 1.0 - a legible 6-inch monochrome e-ink display that requires an external light source to view - just like a paperback.
新产品的屏幕跟Kindle 1.0的一样大小，约为6英寸，使用清晰的单色电子墨水显示，像平装书籍一样，需要外部光源才能看得清楚。
Tip: For spark in a backlit portrait or silhouette, try compositions that include the light source. This can drive your meter crazy, though, so bracket your exposures.
小提示：在拍摄背光照明的人像或剪影时，试着将光源纳入构图中，但是这样会导致测光表读数不准，因此可以尝试使用包围曝光法。
A team from the Laboratoire DE Photonique et DE Nano-structures (LPN) of CNRS has developed a light source of entangled photons twenty times brighter than all existing systems.
来自CNRS(法国科学研究中心)光子与纳米结构实验室的团队研究出比现有纠缠光子源亮20倍的新型超亮源。
By positioning the subject near the light source and allowing some of the subject to underexpose, the photographer can let light touch only the most important part of the subject.
让被摄者靠近光源并有选择地让被摄对象的某些部分欠曝，摄影师能让光线照亮被摄者最重要的部分。
Each pixel on a screen shows a color generated by the interplay of one red, one blue and one green light source that are so close to each other that they cannot be distinguished.
屏幕上的每一个像素都是由一束红光、蓝光和绿光相互作用而生成的，它们挨的非常近，是无法分辨出来的。
The process involved using intensive X-ray light produced at the National Synchroton Light Source in Brookhaven, N. Y.
这种方法使用了纽约布鲁克黑文的国家同步加速器光源产生的强大的X射线。
The prototype was tested at the Swiss Light Source synchrotron near Zurich, using a mouse femur fragment narrower than a human hair.
该样机在瑞士苏黎世附近的瑞士光源同步加速器研究中心进行了测试，测试样本是比人类头发还细的老鼠股骨断片。
The prototype was tested at the Swiss Light Source synchrotron near Zurich, using a mouse femur fragment narrower than a human hair.
该样机在瑞士苏黎世附近的瑞士光源同步加速器研究中心进行了测试，测试样本是比人类头发还细的老鼠股骨断片。
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