光线

It's an optical illusion caused by the weak light.

这是由微弱光线引起的视错觉。

After the transient temperature distribution has reached dynamic equilibrium, because of radius temperature gradient periodically changing with time, the optical path difference between center and edge beam is also periodically changing with time.

当晶体温度达到周期性分布后，由于晶体径向温度梯度的周期性变化，引起通过晶体的平面光波的中心和边缘光线相对光程差也随时间作周期性变化。

But the sun's rays then reach us despite having passed, first, through an enormous thickness of the higIT strata of the air, the minute dust of which reflects maximum of the higIT strata of the air, the minute dust of which reflects maximum of the blue rays away from us, leaving the complementary yellow light to pass on, Then, the somewhat coarser dust reflects the green rays, leaving a abundance orange-coloured light to pass on; and finally some of the yellow is reflected, leaving almaximum pure red.

这就充分呈现了低空尘埃的数量之大。但是太阳的光线终于到达了地面。它们先是穿过厚度极大的高空大气层，其中的细微尘埃把大部份蓝色的光反射掉了，让补色的黄光继续通行。然后，粗粒尘埃又反射掉绿色的光，让偏橙色的光继续通行。最后，部份黄色的光也反射掉，剩下几乎是纯红色的了。

But the sun's rays then reach us after having passed, first, through an enormous thickness of the higher strata of the air, the minute dust of which reflects most of the higher strata of the air, the minute dust of which reflects most of the blue rays away from us, leaving the complementary yellow light to pass on, Then, the somewhat coarser dust reflects the green rays, leaving a more orange-coloured light to pass on; and finally some of the yellow is reflected, leaving almost pure red.

但是太阳的光线终于到达了地面。它们先是穿过厚度极大的高空大气层，其中的细微尘埃把大部分蓝色的光反射掉了，让补色的黄光继续通行。然后，粗粒尘埃又反射掉绿色的光，让偏橙色的光继续通行。最后，部分黄色的光也反射掉，剩下几乎是纯红色的了。

When, in ordinary life, we speak of the colour of the table, we only mean the sort of colour which it will seem to have to a normal spectator from an ordinary point of view under usual conditions of light.

当我们在日常生活中说到桌子的颜色的时候，我们只是指在通常的光线条件下，桌子对于一个站在普通观点上的正常观察者所似乎具有的那种颜色。

She led the way through a great drawing-room, rich in satin and ormolu, buhl and inlaid cabinets, bronzes, cameos, statuettes, and trinkets, that glistened in the dusky light; then through a morning-room hung with proof engravings of valuable pictures; through this into an ante-chamber,where she stopped, holding the light above her head.

她带路穿过一个大客厅，客厅里琳琅满目，尽是些缎子和仿金用箔、布尔工艺品①和雕花镶嵌本柜、青铜器、浮雕玉石、小雕塑，以及在暗淡的光线里闪闪烁烁的小件饰物；然后他们又穿过一个晨室②，里边挂满了名贵图画的出版样张；过此便是前客厅，她在前客厅里站住了，把蜡烛高举在头上。

FRIAR LAURENCE The grey-eyed morn smiles on the frowning night, chequering the eastern clouds with streaks of light, and flecked darkness like a drunkard reels from forth day's path and Titan's fiery wheels: Now, ere the sun advance his burning eye, the day to cheer and night's dank dew to dry, I must up-fill this osier cage of ours with baleful weeds and precious-juiced flowers.

黎明的曙光含笑地送别眉头紧皱的月夜，用光线在东方画出鱼鳞般的云霞，向黑暗撒下用光织成的鱼网；黑夜像晕头转向的醉汉，被太阳的火轮追赶出白昼的轨道。现在，太阳神还未圆睁火红的眼睛，白昼还未欢腾，露水还未晒干；我必须用苦涩的野草和鲜艳的花朵盛满我这个柳条筐。

They are not ostentatious and there's often a play of light and joyful pure colours.

它们并不卖弄玄虚，往往只是巧妙地运用了光线和令人愉悦的纯粹颜色。

Causes include accidental exposure to light or X-rays, overdevelopment, using outdated film, and storing film in a hot, humid place.

产生这种现象的原因包括偶然在光线或X-光下曝光，过度显影，使用了过期的胶片或在热和潮湿的地方储存胶片。

Well, you won't overexpose the shot in this light.

在这种光线下，不会曝光过度

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。