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This is the rule of thumb for anybody who is looking for a second hand binocular with maximum performance: If it is a Porro, it should have been made after 1980 (availability of multi layer coating), if it is a roof prism, then not earlier than 1990 (phase-shift coating).

所以对二手镜子光学表现有要求的买家而言，这里有一条基本原则：要是买保罗镜，最好是1980年以后的，如果买屋脊镜，就别买1990年以前的。

Without any doubt, the Swarovski Habicht delivers the best optical performance of this competition. This is a high tech Porro prism binocular with almost perfect optics and accurate mechanics.

毫无疑问，施华洛世奇的Habicht提供了本测试最佳的光学表现，这是一个高科技保罗棱镜望远镜，拥有几乎完美的光学和精确的机械性能，它只有一个弱点：单薄的视场。

A unique 946 nm and 473 nm single-frequency non-planar ring cavity constituted of a thermally bonded Porro prism and a corner cube is proposed .

提出并实现了由热键合直角棱镜与角锥棱镜构成的新型946 nm及473 nm单频非平面环形激光器。

Whoever is searching for a current line high end 8x50 will probably fail to find a decently priced Porro glass, but end up with a roof-prism design such as Leica's Ultravid or Swarovski's SLC and will have to pay a premium.

谁若在搜寻当前生产的高端8x50，将无法找到合适价格的保罗镜，只能找到屋脊镜如Leica's Ultravid或者Swarovski's SLC，并且要付出更多费用。

When Zeiss Jena in 1985 introduced a new high-end line of Porro Prism binoculars, which originally included the 8x50 Octarem and the 12x50 Dodecarem, they did something very smart: They returned back to the classical design with a long body shape, allowing for longer focal lengths and therefore relaxing the technical requirements inherent in the Nobilem Super without the need to sacrifice optical performance.

1985年Zeiss Jena生产了一款新的高端保罗望远镜，最初包括8x50 Octarem和12x50 Dodecarem，它们在下面事上做的很聪明：返回到了长身躯的传统设计，允许更长的焦距，于是放宽了Nobilem Super固有的技术要求，也不需要牺牲光学性能。

By thermally bonding the YAG crystal with 2 mm thick Nd∶YAG crystal,the Porro prism supplies multi-functions such as laser amplification,closuring the light path,polarization sensitivity to the 946 nm and so on.

直角棱镜由无掺杂的YAG晶体和2 mm厚的Nd∶YAG晶体热键合形成，可提供激光增益、光路闭合及对946 nm激光起偏等多种复合功能。角锥棱镜由熔融石英材料构成，在环形永磁铁作用下，提供法拉第旋转作用。

It is caused by the different colours of light travelling different speeds in the prism material.

产生的原因是不同颜色的光在棱镜里传播的速度不同。

Life is delightful, my dear, it all depends on the prism you look at it through.

生活是美好的，亲爱的，就看你透过什么玻璃去观察人生。

The story of how the secret of life has been examined through the prism of the human body.

从人体的多样性研究生命秘密的故事。

Life is delightful,and it all depends on the prism you look at it through.

我想起了在《茶花女》中那一句：生活是美妙的，这全要看你是从哪一个角度去看。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。