首先，把一个照相底片覆盖上感光材料。
First, a photographic plate is coated with a light-sensitive material.
当时汤博年仅22岁，肩负着比较照相底片的艰巨任务。
Only 22 at the time, Tombaugh was given the laborious task of comparing photographic plates.
鱼胶原蛋白在照相底片，生物材料和食品行业有特殊的应用。
The fish collagen has special application in the photographic negative, the biological material and food industry.
这个过程非常简单，首先，把照相底片用感光材料包裹起来。
The process is very simple. First, a photographic plate is coated with a light sensitive material.
在照相技术中，覆盖在照相底片上的由胶和银盐组成的感光物质。
In photography, the essential light sensitive coating on photographic film comprising gelatine and silver salts.
尽管它是看不见的，但我们知道它是存在的，因为它能依照相底片感光。
Although it is invisible, we know that the ultra-violet is there because it affects a photographic plate.
为了我以后洗照片方便点，你能否将数码相机的照相底片拷到U盘里给我那？
Could you copy the pictures in your CAM to an USB? So it would be easier for me to print later.
本书与那些传统历史书籍的关系犹如照相底片与相片的关系，暗区与亮区被颠倒了过来。
The book bears the same relations to the traditional texts as a photographic negative does to a print: the areas of darkness and light have been reversed.
报道了作者关于天文照相底片感光特性测量的部分实验数据和研究成果，总结了在该领域内长期工作的经验。
In this paper some experimental data and results on the measurement of the sensitive character of astronomical photographic plate are offered.
我们得把底片放进照相机里。
气球驾驶员约翰·斯坦纳在宾夕法尼亚州伊利为自己的热气球充气。 图为最古老的飞行器照片，摄于1857年，采用的是四分之一感光底片旧式照相法。
Aeronaut John Steiner inflates his hot air balloon at Erie, Pennsylvania, as seen in the oldest known photograph of an aircraft, a quarter-plate ambrotype taken in June 1857.
我想要替我的照相机买一卷底片。
接下来他又发现，如果他把他的手放在这种射线和照相的底片之间，这种射线可以使他手的骨架在底片上形成一个影子。
The next thing he found out was that if he put his hand between the rays and a photographic plate, the rays could print a shadow of a bony framework of his hand on the plate.
采用新型乳剂制备技术，研制出彩色底片感红层核壳型乳剂，其照相性能得到明显的改善。
By using a new emulsion making technique, a core-shell AgX emulsion for color negative red-sensitive layer was prepared successfully with photographic characteristics significantly improved.
由于这个原因，照相机拍出的底片上浅色的物体总是呈现出深色的形状，而深色的物体颜色却浅一些。
For this reason the "negative" picture taken by a camera represents light objects as dark shapes, and dark objects as lighter shapes.
我热爱暗室，即使当没有暗室的时候，我过去还用6x6的哈苏120胶片照相，在特制的实验室进行底片处理后，再进行数字化处理。
I loved my darkroom, and even when I didn't have my darkroom anymore, I still was shooting 6x6 Hasselblad 120 film and processing it in a special lab, and then digitizing it.
我热爱暗室，即使当没有暗室的时候，我过去还用6x6的哈苏120胶片照相，在特制的实验室进行底片处理后，再进行数字化处理。
I loved my darkroom, and even when I didn't have my darkroom anymore, I still was shooting 6x6 Hasselblad 120 film and processing it in a special lab, and then digitizing it.
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