1.
Blocking-out: The operation of eliminating undesirable backgrounds and portions of negatives by opaquing or masking the image.
退地:把底片上不需要的地方或背景用遮光液或用遮片掩盖的操作。
2.
To cover(a part of a photographic film)by the application of an opaque border.
用遮光框遮住（胶片的一部分）
3.
Block out the bottom of this picture when it is printed
图片印的时候把底部遮去。
4.
Leaf Physiological Response of Euonymus japonicus to Different Shading Treatments
不同遮阴处理大叶黄杨叶片生理响应
5.
Masking tape: A translucent, light-blocking red adhesive tape for masking out the protected areas on film.
遮光胶纸(红胶纸):在菲林片上,遮盖保护范围用的半透明但遮光的红色有粘性胶带.
6.
mended usually clumsily by covering a hole with a patch.
通常是通过粗陋地用碎片遮盖小洞而修补。
7.
Image area on 35mm motion-picture films with masked picture--Positions and dimensions
GB/T5298-198535mm电影遮幅法影片画面的位置及尺寸
8.
The stars hazed over as a large cloud covered the night sky.
一大片云遮住了夜空，这时星星变得朦胧起来。
9.
The top of the mountain was covered with a dark cloud, which took shine off the front view of the mountain.
一片乌云遮住山顶, 使山前的景物黯然失色。
10.
You have to black out all the windows to develop films.
要使底片显影你得用黑布遮住窗户以免透光。
11.
The sun was concealed by the dreary expanse of grey cloud that covered the wintry sky.
天气酷冷，天空中一大片阴暗的灰云遮没了太阳。
12.
Spotting: Eliminating white spots on negative by painting with opaque.
填沙孔:用遮光液把阴片上的透光白点清除。
13.
In fact, leaves may adapt to sun or shade as a result of acclimatization.
由于适应性，叶片能适应向阳或遮阴的条件。
14.
Effects of Shading Treatments to Leave Nutrients of the Potted Gamellia Sasangua in Greenhouse
遮阴对盆栽茶梅叶片内营养物质的影响
15.
Effects of Shading at the Whole Growth Stage on the Leaf Morphology and Function of Different Maize Varieties
遮阴对不同品种玉米叶片形态和功能的影响
16.
Velocity Measurement System by Laser Shielding Method Base on SOPC Technology
基于可编程片上系统的激光遮断法测速系统
17.
Research on Wireless Control System for Sun Shelter Based on STC SCM
基于STC单片机的遮阳篷无线控制系统的研究
18.
You can get rid of the unwanted detail by masking out the bottom of the negative during processing.
你可以在洗印照片时遮住底片的底部以去掉那不需要的部分。