对光的英文：
beam-focusing
A sensation of lightness.
对光的感觉
The eye reacts to light.
眼睛对光起反应。
Our eyes react to light.
我们的眼睛对光起反应。
Sensitivity or responsiveness to light.
感光性对光的敏感和感应性
If my camera is not brought into focus, the photograph will be blurred.
如果我的照相机不对光，照片便会模糊不清。
Einstein' s new theory on optics changed classical scientific ideas about light
爱因斯坦新的光学理论改变了人们对光的传统科学概念。
The detection,absorption,and use of light,as for vision in animals or phototropism and photosynthesis in plants.
光感应对光的感觉、吸收和利用，如对动物的视野和植物的向光性和光合作用
n. 横梁；光线；电波；笑容；平衡木
v. 照射；发送，播送；笑容满面；流露
a beam of pleasure
一丝笑容.
a transverse beam
横梁,2. 【数】横截的,n.1. 横向物;横轴;横断面,2. 【数】横截轴,3. 【解】横肌
The spans of the conjugate beam and actual beam must be equal.
共轭梁和实际梁的跨径必须相似。
The spans of the conjugate beam and actual beam must be equal
共轭梁和实际梁的跨径必须相似。
That transmitter was beamed at Russia.
那台发射机曾用于对俄罗斯广播。
v. （使）集中；（使）聚焦；调节焦距
n. 焦点；焦距；中心
The image is in focus.
这影像在焦点上。
Focus your attention on your work.
把注意力集中在你的工作上。
The research focus of uncommitted robbery has two.
抢劫未遂的研究焦点有二。
The role of this part is to educe the focus of this article.
这一部分的作用是引出本文的重点。
"then focus on the colour of the image, "
接着让他们关注图像的颜色