let db2 know about that uneven distribution of duplicate values by gathering value-frequency distribution and/ or histogram statistics for the column via the runstats utility.

language is an important factor to build up a society.

语言是组成社会的一个不可缺少的因素。

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conclusion sct 3d imaging was a necessary method in the diagnosis of central pulmonary carcinoma, it was a complementary method to the traumatic fiberoptic bronchoscopy.

结论：螺旋CT3D成像是诊断中央型肺癌不可缺少的方法，是创伤性纤维支气管镜检查的补充方法。

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this paper also presents the finite differential method ( fd method) as a tool of calculating the field distribution and effective propagation constant. furthermore, we figure out the relationship between the bend radius and the loss of waveguide.

由于弯曲波导是AWG器件中不可缺少的结构单元，论文运用柱坐标下有限差分法来计算弯曲波导的场分布和有效传播常数，找出了波导弯曲半径与波导弯曲损耗之间的关系。

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in the high rate wireless communication system, automatic repeat request ( arq) technology is indispensable in link layer, which shields the packet loss of the wireless channel from the upper level.

在高速无线通信中，自动请求重传（ARQ）是链路层不可缺少的技术，它通过重传向上层屏蔽无线链路上包的丢失。

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as an indispensable part of the strategic ballistic missile defense ( bmd) system, the space early warning system ( sews) is a highly integrated and high-precision optical-mechatronic system.

空间预警系统（SEWS）是美国弹道导弹战略防御体系（BMD）中不可缺少的组成部分，是一个高度集成、高精度的光机电一体化系统。

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wireless access unit is an indispensable component in cmt system that takes in charge of the communication with the mobile station.

无线接入单元（WAU）担负着和移动台进行空中信号通信的任务，是CMT系统中一个不可缺少的重要部件。

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recently with the cognitive shift of the research on metaphor, lakoff and johnson ( 1980) claim that metaphor is an indispensable tool people use to construct their conceptual system.

近年来随着隐喻研究的认知转向，Lakoff和Johnson（1980）等明确提出隐喻是人类用来组织其概念系统不可缺少的工具。

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jacobs engine brake system, therefore, as a mature sustained brake system is indispensable for the commercial vehicle on mountain roads.

因此作为一种高效的持续制动装置，Jacobs发动机制动系统对于保障商用汽车在山区公路连续下坡行驶的安全性是不可缺少的。

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at present, machinery cad is going to be integrative cad/ cam/ cae, and the kinematics dynamics analysis software for machinery system is one of the necessary supporting softwares of integrative cad/ cam/ cae.

当今，机械CAD向CAD/CAM/CAE集成化方向发展，机械系统运动学/动力学分析软件是集成化CAD/CAM/CAE不可缺少的支撑软件之一。

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the electromagnetic compatibility of printed circuit board ( pcb), which is the necessary for the electronic devices, can influence on the performance of the devices directly.

印刷电路板（PCB）作为电子设备不可缺少的部分，它的电磁兼容性能将直接影响电子设备的性能和稳定。

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icam-1 is an indispensable substances of neutrophil migration, aggregation and exert cytotoxicity, participate in the occurrence and development of many diseases.

ICAM-1是中性粒细胞游走、聚集、发挥细胞毒作用不可缺少的物质，参与许多疾病的发生、发展。

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the isolator-circulator components with same frequency duplex are essential units in tr components.

具有同频双工的隔离器环行器组件是TR组件中不可缺少的单元。

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automatic answer system ( aas) is the important part of the distance education system based on web.

自动答疑系统（AAS）是基于Web的远程教学系统中不可缺少的重要组成部分。

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hall current sensor is one of the detectors indispensable to the new electric powder and electronic technologies.

Hall电流传感器是新型电力电子技术中不可缺少的检测器之一。

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the interpretation or compiling of g code is indispensable in the software for numerical control system.

G代码的解释或编译是数控系统软件中的一个不可缺少的环节。

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planar gel electrophoresis is an indispensable tool for the separation and analysis of dna, rna and protein;

平面凝胶电泳是DNA、核酸、蛋白质日常分离分析不可缺少的工具；

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with the increasing popularity of the internet, the internet media is becoming an indispensable information media.

随着Internet的日益普及，互联网媒体已经成为一种不可缺少的信息传播媒介。

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make sure that susan comes to our next party-she is the life of the party.'

通常这些人都很活跃、活泼、给人带来欢声笑语。一定要让苏珊出席下个派对-她绝对是派对不可缺少的核心人物。

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relay radio communication for railway

铁路无线电中继通信

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firstly, the paper holds that chen is much influenced by his time in the formation of ideas, and directed by the mainstream thoughts and rapidly developing art education in contemporary china. it's impossible to separate advanced culture from cultural innovation.

首先，本文认为，陈之佛的美术教育思想的形成是受了时代气氛的熏染，和中国近代美育主流思想的引导作用以及中国近代美术教育的蓬勃发展是不可分开的。

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