明暗的英文：
light and shade

参考例句：

To diversify(something)in color,shading,or character;variegate.
呈多样化使(某物)在色彩、明暗或性质上多样化;使不同

General effect of colour,light and shade
色调、明暗、影调的总体效果

The negative image on a photographic plate
相片板上明暗相反的像

Of particular importance to the observer is the position of the terminator.
对于观测者特别重要的是明暗界线的位置。

Of particular importance to the observer is the position of the terminator
对于观测者特别重要的是明暗界线的位置。

Tone： One of the three characteristics of color. It is the brightness sensation between black and white.
色调:是颜色三特性之一。色调是黑与白之间的明暗感觉。

Such ornamental work represented two dimensionally by chiaroscuro.
细工饰品通过明暗对比表现出两维性此种装饰品

This film will give print better contrast and more accurate color rendition.
这底片将使照片具有更好的明暗对比和更逼真的色彩。

A detail of a Rembrandt portrait illustrating the technique of chiaroscuro.
一幅林布兰肖像画的局部显示了明暗对照的绘画技术.

It's a good idea to block in the main masses of light and shade before touching any details of the drawing.
这是一个好主意：在画出图画的细节以前，先画出主要的明暗层次的轮廓。

light是什么意思：
n. 光；光源；灯；点火物；日光；角度，眼光
v. 点，点燃；点着；照亮；用灯光指引
adv. 轻的，轻装的
adj. 浅色的；轻的；少量的；轻微的；（负担）轻的；轻盈的，轻快的；清淡的

The torch was lighted.
火炬点亮了。

I'm lost as a light is lost in light.
我如同灯盏迷失在光明里。

The saturation and lightness of light also affect our perceptions.
饱和度和亮度也影响到我们的感觉。

Ambient light: As the name suggests, this light is present everywhere.
环境光：就如其名所暗示，各处都存在光照。

The chamber was ablaze with light.
会议厅里灯火辉煌。

shade是什么意思：
n. 荫；遮光物，灯罩；细微的差别；灵魂
v. 渐变；使阴暗；使渐变

What is the good of a sundial in the shade?
把日晷放在暗地里有何用处?

This seat is shaded by a tree.
这个座位有一棵树遮阴。

The trees afford grateful shade.
这些树提供了宜人的纳凉之所。

They ate and drank and lounged in the shade.
他们在阴凉处吃吃喝喝懒懒地闲坐着。

Look at subtle shades of brown.
看这一片淡棕色。