Principle and design of a ring sight consisting of calcite crystal plate and polarized elements are proposed.
本文介绍一种光环瞄准镜的原理和设计，它是用方解石晶体薄片和偏振器件组成。
The ring sight presents a set of concentric rings when it is illuminated by the target and the background. Brightness of the rings is in proportion to that of the target and the background.
在目标光和背景光的照射下，呈现出一组同心圆环，其亮度与目标和背景的亮度成正比。
But, for answer, the old man only held his lanthorn up, so that in the ring of its pale light they saw some sight or other in the street.
不过，作为答复，老人只是把灯笼高高提了起来，好让他们在那黯淡的光圈中能见到些街上的景象。
As he pummeled reigning champ Tommy Burns, police stormed the ring to stop the fight, and film cameras were shut off to spare the world the sight of a black knocking out a white for the crown.
当他正暴风骤雨般击打之前享有冠军的TommyBurns时，警察闯入拳台终止了比赛。摄影机也被关掉，以免让全世界看到一个黑人击倒一个白人赢得王冠的画面。
Changchun Bridge Road & Yuanda Road, connected with West Ring 3 and West Ring 4, is an important traffic artery and sight-seeing avenue of Beijing Haidian District.
长春桥路—远大路连接着西三环路和西四环路，是北京海淀区一条重要的交通干道和景观大道。
This morning I caught sight of my face in the bathroom mirror. I am paper-skinned, 8 gaunt, yellow, ring-eyed, hair matted.
今天早晨，我从浴室镜子里瞥见自己的脸像纸皮一样，憔悴、蜡黄、眼圈发黑、头发打结。
The southwest of Dunhuang City 5 kilometers have a miraculous desert spectacular sight-ring sand mountain.
敦煌市西南5公里处有一处神奇的沙漠奇观——鸣沙山。
The southwest of Dunhuang City 5 kilometers have a miraculous desert spectacular sight-ring sand mountain.
敦煌市西南5公里处有一处神奇的沙漠奇观——鸣沙山。
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