必然存在

• Because both of ctod and j - integral can be used to evaluate structure security , there must be a relationship between them , this paper probes the relationship between ctod and j - integral along with their critical value c and jic on the basis of the fruits from the original
  由于ctod和j积分都可以作为结构安全评定的参数，它们之间必然存在着一定的联系，本文在前人研究成果的基础上，对ctod和j积分及其特征值_ c和j _ ( c )的关系进行了探索。
• There exists a legal saying : the burden of proof is the backbone of civil litigation . although the civil law system and the anglo - american law system have different fact - finding method , they both shall concern about the question of burden of proof
  无论大陆法系还是英美法系，证明责任问题都因民事诉讼的客观规律而必然存在，虽然大陆法系和英美法系自身的诉讼模式决定了其各自在诉讼中发现事实方式的迥然相异，以及对诉讼中事实证明程度的不同要求。
• There are two problems to be solved while analyzing the experimental data . firstly , the detector effect and background exist in the processes of getting data . so , we should select events using suitable parameter - cuts and correct the results with mc simulation
  在对实验数据进行研究时，有两个问题需要解决：其一，在实验数据的获取过程中，探测器效应和背景等必然存在，因此，必须适当地采用参数截断的方法加以选择，并且利用蒙特卡洛( mc )模拟对结果予以修正。
• However , the user has to get the address via dhcp . so to realize certification at the application layer , the only way a user can leverage to get the address will be broadcasting . then there is inevitably the problem of address substitution or the availability of public network address as soon as the user turns on the machine
  Vlan + web方式本身数据的传输是透明传输，但由于本身用户是通过dhcp得到地址，为了能够进行应用层的认证，用户必须通过广播得到地址，因此必然存在地址替换或用户开机就得到公网地址的问题。
• Whether from commiseration for a woman of so miserable a destiny ; or from the morbid curiosity that gives a fictitious value even to common or worthless things ; or by whatever other intangible circumstance was then , as now , sufficient to bestow , on some persons , what others might seek in vain ; or because hester really filled a gap which must otherwise have remained vacant ; it is certain that she had ready and fairly requited employment for as many hours as she saw fit to occupy with her needle
  也许是出于对这位命苦的女人的同情；也许是为了给司空见惯的或一文不值的东西添加怪异的成份使人好奇；也许是出于无法解释的原因，这在当时和现在都是有的，对有些人来说，有些东西是不能强求的；也许是海丝特确实填补了原来必然存在的空白；有点可以肯定，那就是只要它认为干针线活是合适的，那她想干长时间，就有多少活在等着她呢。
• Landscape architecture is about making life in some sense better . to the extend that it concerned with social matters and take account of some social goals , but it also pursues aesthetic goals . furthermore , both traditional politics and landscape architecture are now having to work out the place of new , ecologically derived goals like sustainability
  景观设计活动作为一种服务于人的社会活动，必然存在着“使人们的生活在某种程度上变得更好”这一社会目标，但它同时亦追求纯粹的美学目标，不仅如此，来源于环境价值领域的“可持续性”也已经作为生态目标被人们广泛认同。
• Because euler equations have disconnected solutions named shock wave in numerical simulation flow field , and to make sure the disconnected solutions not expanding or vanishing among parallel computation sub - domains , there must be certain connections in the numerical value variable among the sub - domains
  由于在欧拉方程数值模拟求解流场区域内存在间断解即激波，而计算流体力学并行数值计算是在分区的基础上进行的，为了使流场区域内的间断解不因分区并行计算而膨胀或消失，分区之间的数值变量必然存在着一定的联系。
• But environmental labelling system which established on basis of eco - centrism conflicted with traditional law system which established on basis of environmental ism in reality and theory . it includes : the legislate need consummate ; the execution existed mistaken areas and need to regulate orientation ; the supervision mechanism is monotonous and nerveless
  但建立在人类中心主义伦理观基础上的传统法律制度与建立在现代伦理观基础上的环境标志制度必然存在着现实和理论上的冲突，包括：立法上需要完善；执法上存在误区，需要调整方向；监督管理机制单调而无力等。
• Research of error resilience technology for video communication based on h . 263 codec major : signal and information processing data : author : meng yan signature : tutor : zhang erhu liu shichang signature : abstract the reconstructed image quality can be degraded substantially by errors during the transmitting over the communication channel , especially when the video is compressed by temporal and spatial coding ways , which leads to error propagation in frame sequence , so the error resilience procedure should be performed to improve the reconstruction quality
  由于通信系统的信道不可避免的存在噪声，传输数据流必然存在误码。对于h . 26x的视频编码流，由于空域和时域的压缩方法以及熵编码方法的应用，即使是一个比特的错误，常会影响一个区域的图像不能正确解码，同时错误的图像还会扩散影响后续数帧图像。因此有必要在标准解码程序的基础上，添加容错功能。