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According to the transnational periodically symmetry of crystal plane in its space,the author introduce the Thomas-Fermi equation in crystal planar channeling electric fields;then calculate the electric fields of single crystal Si(110)and its critical angle.

根据同一晶向的晶面具有平移周期对称性，将托马斯费米方程引入晶体的平面沟道中求解Si(110 )平面沟道内的电场；然后把求得的结果用于计算平面沟道临界角。

The adjustable rate preferred stock is preferred stock that the dividend is reset periodically in terms of an applicable rate.

可调整比例的优先股是这样一种优先股，股利依据一个合适的利率定期重新确定。

For the sake of the accuracy and reliability of the pressure calibration, the pressure gauge must be checked periodically.

为了保证压力测量仪表的准确、可靠，必须对压力测量仪表进行定期检定。

Carry out effective supplier resources management and periodically conduct sales plan and performance review to make sure the on-line business gets supplier's guarantee of new item, exclusive item, promotion program and in-stock.

实施有效的供应商资源管理和定期实施销售计划和绩效评估，以确保我们的在线商务得到供应商的保证新东西，专属项目、推广计划和in-stock。

A first order quasi phase matched periodically poled LiNbO 3 for SHG with 6.5 μm period, 12 mm length, 10 mm width and 0.5 mm thickness has been successfully fabricated by applying an external electric field at room temperature from an high pulsed voltage generator. About 18 mW of CW 0.532 μm green light was obtained pumped by an 1.1 W of CW 1.064 μm Nd∶YAG laser with end coupling, which corresponds to 1.6% power conversion efficiency.

通过高压脉冲电场极化，制备了周期为6.5 μm、长为12 mm、宽为10 mm、厚为0.5 mm的一阶准相位匹配周期性极化铌酸锂；由1.1 W连续1.06 μm Nd：YAG激光器抽运，在5°时产生了约18 mW、0.532 μm的倍频连续绿光，其对应的二次谐波转换效率约为1.6%，二次谐波的归一化转换效率约为1.5% cm-1W-1，相当于79%的周期性极化铌酸锂的理想非线性系数。

In order to study the influence of UV pulse laser pre-treatment on surface image of fused silica and validate its upgrade effect on anti UV laser damage ability of fused silica,using 355nm YAG laser raster to scan fused silica optics by means of power increase by degrees periodically,the change of surface image was studied and its anti-laser damage threshold at 355nm was measured.

为了研究紫外脉冲激光预处理对熔石英表面形貌的影响，验证其对熔石英元件抗紫外激光损伤能力的提升效果，利用输出355nm 3倍频紫外脉冲激光的YAG激光器，采用光栅式扫描的方式对熔石英表面进行了全口径能量周期递增的激光预辐照处理，并在处理结束后研究了表面形貌的变化，考核了其在355nm脉冲激光作用下的损伤阈值。

Therefore,we should periodically do some cleaning and rearrangement of our desktop, room and even ourselves.

因此，我们需要对桌面、房间甚至我们自身定期进行打扫整理是很重要的。

In a multi-project environment, we may need to periodically reassign the staffs to the tasks of each project.

在一多专案的环境里，可能需要定期重新指派人力至各专案中的工作项目。

D. Constantly check whether any foreign materials jam the belt feeding machine , and periodically lubricate the drum, reductor and each bearing. Examine the exposed gear, and check and maintain the removed device, so as to ensure the safety and sound operation of the equipment.

d。经常注意带式给料机是否有杂物卡住，定期地对滚筒、减速机及各轴承注油，注意对开式齿轮的检查，迁出装置的检查及维护工作，以保证设备安全与完好运行。

In the whole, the policy has periodically regulative effects in condition of huge price.

从总体来看，在付出巨大代价的情况下，土地闸门政策具有周期性的调控效果，但其调控手段存在着一系列不合时宜的问题。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。