1.
luminous visibility diagram
各种能见度情况下灯光能见距离图
2.
Luminous Range Diagram for obtaining the range at which a light can be seen allowing for its power and the prevailing visibility.
光达距离图供只考虑灯标强度和当时能见度确定能看见灯光的最大距离。
3.
light signal visibility test
灯光信号显示距离测试
4.
guide number =GN
门灯指数，以距离计算出光圈
5.
No colour fade after300 hours close distant exposure to arc lamps.
以炭精弧光灯近距离照射300小时，油漆没有褪色。
6.
Visible Characteristics and Calculation of Detecting Distance for Space Target
空间目标可见光特性与探测距离估算
7.
black-light lamp
不可见光灯,黑光灯
8.
The rule is," Double the distance, four times the speed.
比如，你的闪光灯在感光度100时的有效距离为20英尺。
9.
Going on the Ferris Wheel, we can see the lights of the city.
坐观览车我们能看见这座城市的灯光。
10.
We are now within sight of the shore.
我们现在的距离能看见海岸了.
11.
Visibility was down to 100 metres in the fog.
大雾中能见距离已降至100米.
12.
The sand in the air reduced visibility to a hundred yards.
空中的沙尘将能见距离降低到100 码。
13.
lampposts placed at regular intervals
按等距离设置的路灯柱.
14.
If you want to adjust the brightness as you always do to the ordinary lamps, just change the distance between the photodetector and the bulb. It is easy and funny.
如果要象普通调光台灯一样调光，只要改变探头和灯泡的距离即可，使用起来十分简单，有趣。
15.
Furthermore, light intensity decays accordingly to a given ratio of the distance from the lamp.
另外，光线强度按比例随着与到灯之间的距离的拉大而减小。
16.
Attenuation: This is how the light changes over distance - how it fades out usually.
衰弱：这是灯光在一定距离之后怎样变化，怎样减弱的。
17.
Study on the ionization constant of scutellarin with UV-Visible spectrometry
紫外—可见分光光度法对灯盏乙素的电离常数的研究
18.
Because of the great speed of light, we see a lamp light up almost at the exact moment we turn it on.
由于光速极快，我们几乎能在开灯的那一瞬间就看见电灯亮起来。