The identification of the crash victims was a long and difficult task.
鉴别坠机意外伤亡者的工作费时而且困难重重。
Much like your personal identification number (PIN), your password is your secret; if you choose your password well, it's likely difficult for others to guess it at random.
与您的个人识别号码(PIN)相同，您的密码也是保密的，如果您选择了合适的密码，那么其他的人将很难猜到它。
Therefore, text parsing in these languages requires the identification of word boundaries, which can be a very difficult task.
因此，这些语言中的文本解析需要标识单词的分界，而这是一项十分困难的工作。
The identification of previously unknown target sites for antimicrobial action has proved difficult.
经证明很难确定先前未知的抗菌素作用靶位。
Isomorphism identification is an important and difficult problem in mechanism type synthesis, it is also one of the most difficult problems in graph theory.
同构识别是机构类型综合中一个重要而又困难的问题，同时，也是图论中非常难解决的问题之一。
The automatic identification of seal imprints is a very difficult problem of pattern recognition.
印鉴自动识别是模式识别中的一项非常困难的课题。
The best identification documents for verifying the identity of prospective customers are the ones that are the most difficult to obtain illicitly and the most difficult to counterfeit.
最好的身份证明文件，核实客户身份的准的都是最棘手、最困难的非法取得伪造。
Aiming at the problem of difficult system identification modeling for control system, an identification modeling system was designed for control system by using support vector regression (SVR).
针对非线性控制系统辨识建模较为困难的问题，利用回归型支持向量机(SVR)设计了一例控制系统的辨识建模系统。
Dermatophyte strains frequently vary in the expression of these phenotype characteristics; the identification of dermatophytes is therefore often difficult.
但是，同一皮癣菌的菌种在形态上的表现差异性常常很大，因此，皮癣菌的鉴定就显得相对困难。
The severe numerical instability in complex frequency modal mass identification from frequency response function makes it difficult to identify physical parameters.
利用频响函数识别复频率模态质量存在着严重的数值计算不稳定性，给物理参数的识别造成困难。
The variety identification of rice seed is the most difficult in many quality factors.
在众多的质量指标中，尤以品种纯度的鉴定最难。
The stratigraphic trap identification is becoming more and more difficult with progressing petroleum exploration in Junggar basin. How to find the low-amplitude traps in it?
随着准噶尔盆地勘探的深入，圈闭识别的难度越来越大，低幅度背斜圈闭的识别已成为人们关注的对象。
ABO blood group is the most important blood group antigen in human, and the identification of suspicious ABO blood group is difficult in clinical transfusion.
ABO血型抗原是人类最主要的血型抗原，ABO疑难血型的鉴定正成为安全输血的一个重要课题。
The information identification is the most difficult in the application of high-resolution remote sensing images.
信息识别是目前高分辨率遥感应用中的最大障碍。
Water-flooded zone identification of oil-saturated stratum is a difficult task during the middle-late period of the development, which needs an immediate solution.
油层水淹状况识别是油田开发中后期油田生产中急需解决的一个重要问题。
In any particular case the identification of the accounting entity may be difficult.
在特殊的情况下，很难确定会计单位。
Its wireless technology allows users to build an identification system for an event or on a remote site where cable installation is difficult.
它的无线技术使用户能够在一项活动中或电缆安装困难的远程站点上建立一个识别系统。
Disadvantages: fragile, poor insulation and portability, expensive, difficult to powder bone content and quality assurance and identification.
缺点：易碎，隔热性和便携性较差，价格贵，粉骨含量和品质很难保证和鉴别。
The characteristics of electronic business affairs' being virtual, intangible and without definite region result in vague identification of levying duty object and make taxation more difficult.
电子商务的虚拟性、无形性和无地域性，造成经营所得来源地和课税对象的识别模糊，加大税务检查和征管难度。
Chromosome identification by traditional banding technique has been difficult in oysters.
传统的带型技术很难鉴定牡蛎的染色体。
Fluid type identification of fracture reservoir is a worldwide difficult problem.
裂缝性储层流体类型识别一直是测井界亟待解决的难题。
Perfect results of nonlinear systems identification used traditional methods established on the linear or intrinsically linear system are difficult to get.
使用建立在线性或本质线性系统基础上的传统辨识方法对各种非线性系统建模、辨识难以获得理想结果。
Objective:To explore the factors which related to the difficult identification of childhood affective disorder at first interview.
目的：探讨儿童情感性精神障碍首次确诊困难的原因。
The competition in companies is so fierce and the competitive environment is so complex, that the competitor identification becomes more and more important and difficult.
企业竞争日益激烈，竞争环境日趋复杂，竞争者识别变得越来越重要，但识别的难度却越来越大。
Identification of dynamic natural frequencies and viscosity damping coefficient for a large-scale structure in practical working condition is a very difficult problem.
大型构件在实际工作环境中的系统动态固有频率和粘性阻尼系数辨识一直是一个“棘手”的问题。
In the practice application of identification theory, it is difficult to select an appropriate identification algorithm for different object and different model building purpose.
在系统辨识理论的实际应用中根据不同的对象和建模的不同目的去选择合适的辨识算法是一件不容易的事。
The macro model of traffic flow in freeway is a high order, nonlinear and time variant system which makes the problem of its identification become very difficult.
高速公路交通流模型是一个高阶非线性时变系统，这使得该模型的辨识问题成为一个非常困难的问题。
The macro model of traffic flow in freeway is a high order, nonlinear and time variant system which makes the problem of its identification become very difficult.
高速公路交通流模型是一个高阶非线性时变系统，这使得该模型的辨识问题成为一个非常困难的问题。
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