系统发生

Located at the high trophic level of wetland ecosystem, and being sensitive to the changes occur in the entire ecosystem, waterbirds are important criteria for assessing the quality and importance of wetlands.

湿地鸟类位于湿地生态系统食物链的较高等级，对湿地生态系统所发生的变化非常敏感，因此，湿地鸟类是评价湿地质量及其敏感性的重要指标。

Physics experiments on large scale uniform and non-uniform granular mixtures avalanche were carried out and the results proved that internal cause of SOC effect was most probably the structure characteristics of the system but not the size of granular or the scale of system.

为验证散粒体崩塌中的自组织临界现象是否是一种有限尺度效应，自组织临界现象的发生终究由系统的尺寸还是系统的组织原则来确定，进行了均匀和非均匀散粒体崩塌的实验。

At the end of this dissertation, the experiment results of the system are provided, and these results show that the system can obtain well output current following performance and unit power factor. And in the experiment process, the voltage and current do not shift, and the process of lock-phase is very quick and smooth.

本文的最后给出了系统实验波形，实验结果表明：系统实现了较好的输出电流跟踪性能，输出功率因数接近1，而且在实验过程中，电流与电压不发生漂移，相位锁定过程平稳，速度快。

Besides, by improved universal generating function method, a multi-state-system reliability model was developed in which common cause failure effect is embodied.

提出了系统非整数阶失效的概念，基于通用发生函数方法建立了含共因失效的多状态系统可靠性模型。

3 In the event of failure of the normal power supply and/or the UPS supply to the PSD system, the mechanism to manually unlatch the sliding screen doors, either by an authorised person on the platform side or from the trackside, shall not be affected.

无论月台门系统的不断电系统或正常供电发生问题时，站务人员应可於月台侧或轨道侧以手动解除门栓之方式而不被影响。

Therefore, it is necessary for modern enterprises to supply reliable and real-time information and services by utilizing computer systems, more and more departments especially those pivotal departments have been unprecedentedly relied on computer systems, however, it is unavoidable for the hardware and software of a computer to have a breakdown, which may certainly results in unmeasured losses.

对现代企业来说，利用计算机系统来提供及时可靠的信息和服务是必不可少的，越来越多的行业、部门，尤其是关键部门，对计算机系统呈现出前所未有的依赖性。但是计算机的硬件和软件都不可避免地会发生故障，会带来无可估量的损失。

If one part of the system suffers a problem, many parts of the system become unusable.

如果系统的一个部分发生了问题，系统的其他许多部分都变得不可用。

By analyzing the core competence the dissertation has proved it is a matching standard of the two-element structure. The aims of any management changing are forming and keeping the competition predominance. The steady resource of the competition predominance is forming and keeping the competition predominance. The core element of competition predominance (such as, the foresight, leading, innovation, quality, entrance vallum, customer regulation, changing cost and partner-relationship.) is a key factor that to found a sueeessful enterprise whatever the changing has occurred in the environment.

通过对核心竞争力的分析证明核心竞争力是两种要素结构匹配的标准或依据；管理变革（包括基于信息系统的管理变革）的目的是为了形成并保持竞争优势，而稳定的竞争优势的来源是形成并保持核心竞争力；不论环境发生了怎样的变化，远见、领导、创新、质量、进入壁垒、消费者规定、转换成本和伙伴关系等仍是建立一个成功企业或具备竞争优势企业至关重要的因素，它们来源于管理系统7要素：文化、人、战略、组织、专业管理、技术管理和信息的有效结合，这种结合形成核心竞争力；管理变革的重要途径就是形成核心竞争力的关键要素的有效结合。

Variation of the system parameters and external disturbances always happen in the CNC servo system.

在数控伺服系统中，当系统参数发生变化或者受到外界干扰时，采用PID控制容易导

DSA features included: dilatations of brain venule could be seen and the number of brain veins increased; the circulati...

其DSA影像学主要表现为：全脑小静脉扩张、迂曲、数目明显增多；全脑动静脉循环时间延长；丘纹静脉和大脑内静脉系统显影增粗、扩张，并发生深静脉滞流，呈现出"雪花样"表现；静脉窦内对比剂滞留、显影延迟或残缺不全。结论：DSA全脑血管造影是诊断脑静脉系统血栓的可靠方法。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。