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Two kinds of bright EPR entangled beams were experimentally generated by means of nondegenerate optical parametric amplifier .

利用非简并光学参量放大器从实验上产生了两种明亮EPR纠缠态光场。

As a result, the two beams of light don't have Faraday nonreciprocal phase error.

仿真结果表明，交叉环有很低的轴向磁场灵敏度，与轴向磁场灵敏度为23.4/的普通环相比，其他参数相同、不对称度为1%的交叉二极子光纤环，轴向磁场灵敏度仅为0.23/。

On all accounts, beams and arches bear loads together in papilionaceous partial tied arch footbridge which can realize the equilibrium of strength and beauty.

在蝶式部分系杆拱步行桥中，主梁和拱圈充分发挥共同承重作用，达到力与美的平衡。

Autotetraploid rice IR36-4X was treated with ion implantation of low energy nitrogen ion beams and a polyembryonic seedling mutant IR36-Shuang was identified in M2 generation.

以低能氮离子束为诱变源，对同源四倍体水稻品系&IR36-4X&进行离子注入，在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双）。

In the present study, the autotetraploid rice IR36-4X was treated with ion implantation technique by nitrogen ion beams and a polyembryonic seedling mutant (named as the IR36-Shuang) was identified in M2 generation. The mutant line was systematically investigated about the location of seedling in polyembryonic seedling, and the cytological initiation of the additional embryo in the 1R36-Shuang was observed and determined.

以低能氮离子束为诱变源，通过对同源四倍体水稻品系&IR36-4X&进行离子注入后在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双），对该突变株后代的多胚苗形态特征及其多胚来源进行了研究。

These bridges often use precast concrete beams.

这些桥梁经常使用预制混凝土射线。

Our two-stage system includes a primary U-beam impact separator and a secondary multi-cyclone dust collector which work together to provide a combined particle collection efficiency in excess of 99.8%. The U-beams, a staggered array of stainless steel channels at the furnace exit plane, capture nearly all of the solids suspended in the flue gas leaving the furnace and internally recirculate these solids to the lower furnace.

两级系统包括一个初级U型钢分离器和一个第二级多旋风集灰器，其共同工作使得颗粒收集的效率超过99.8％。U型钢，也就是在炉膛出口平面处交错排列的不锈槽钢，捕获了离开炉膛的烟气中的几乎所有的固体悬浮物，并以内再循环的方式将这些固体送到炉膛下部。

Four laser beams used for ~ 40 K and ~ 87 Rb cooling and repump lights are obtained by using acoustic optic modulators to offset the frequencies from the three external cavity diode lasers.

三台ECDL通过声光调制器产生四束光，分别作为40K和87Rb原子的冷却光和再抽运光，四束不同频率成分的激光分别注入锁定四台从激光器，然后Rb冷却光、K冷却光和K再抽运光再同时注入半导体激光放大器进行放大。

And also, we have done some researches on the Fresnel number of polygon slits, high efficient retroreflective film, the superluminal and/or subluminal velocities of beams in vacuum, the zero-field truncation technology, fractional Fourier transforms and so on.

同时，开展了多边形光阑菲涅耳数、高效逆向反光膜、真空中光束的超光速与亚光速现象、零场截取技术、分数付里叶变换等相关领域作了研究。

Milford says pigeons even roosted in the ceiling's wood beams.

Milford 认为鸽子甚而被栖于在天花板的木射线。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。