系统发生的

It is indicated that besides periodic and quasi periodic vibrations the system shows different forms of chaotic motion and bifurcation phenomena.

碰摩转子系统所展示的混沌运动以及所具有的各种现象，作为这类系统的显著特征，可以用于诊断汽轮发电机组中经常发生的碰摩故障

In this paper, the line blocking situation, the exchange of optimal power flow analysis of the circuit system, each node under congestion pricing, as well as trends such as changes in the slip road was completed in the Matlab environment to the IEEE14 bus system route blockage occurs in case of simulation and data analysis and achieved good results.

本文针对线路的阻塞情况，用交流最优潮流分析了线路阻塞情况下系统各节点电价以及支路潮流等变化，完成了在Matlab环境下对IEEE14节点系统发生线路阻塞情况下的仿真和数据分析，取得了较好的效果。

Using coupling model M4RC3 and improved MM4, a dust storm and a snow storm were simulated respectively. The effects of radiation parameterization and microphysics parameterization on development of dust storm and snow storm mesoscale system were discussed. Dynamical and thermodynamical diagnoses were also carried out to study the developing mechanism on the systems.

用耦合模式M4RC3和引入三相云显式降水方案后改进和发展的中尺度模式MM4分别对西北地区黑风暴和暴雪进行了数值模拟，讨论了模式中辐射参数化和微物理过程参数化对与黑风暴和暴雪相伴的中尺度系统演变的影响，并对这些系统发生、发展的机制进行了动力学和热力学诊断。

The recent studies on comparative genomics have further suggested that a third round of fish-specific genome duplication in ray-finned fishes might have occurred at about 350 million years ago, during the divergence between teleost fish and basal actinopterygian lineages. Therefore, FSGD might be related to the increase in species number and biological diversity during this time.

近期的系统基因组学研究资料进一步提出，在大约350百万年，辐鳍鱼还发生了第三次基因组复制，即鱼类特异的基因组复制(fish-specific genome duplication， FSGD)，且发生的时间正处在"物种极度丰富"的硬骨鱼谱系和"物种贫乏"的谱系出现分歧的时间点，表明FSGD与硬骨鱼物种和生物多样性的增加有关。

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。

These changes are called bifurcations. If bifurcations or even a versal unfolding are given, all physical phenomena of this system are clear.

弄清了系统的分岔甚至给出了它的普适开折，该系统所发生的所有物理现象都将昭然若示。

The recent studies on comparative genomics have further suggested that a third round of fish-specific genome duplication in ray-finned fishes might have occurred at about 350 million years ago, during the divergence between teleost fish and basal actinopterygian lineages. Therefore, FSGD might be related to the increase in species number and biological diversity during this time.

近期的系统基因组学研究资料进一步提出，在大约350百万年，辐鳍鱼还发生了第三次基因组复制，即鱼类特异的基因组复制(fish-specific genome duplication， FSGD)，且发生的时间正处在&物种极度丰富&的硬骨鱼谱系和&物种贫乏&的谱系出现分歧的时间点，表明FSGD与硬骨鱼物种和生物多样性的增加有关。

The age of MORB-type metabasic volcanic rocks is(1462± 28) Ma using the SHRIMP zircon U-Pb method.The presence of MORB and IAT assemblages suggests the existence of an ocean basin in Yunkai area,Guangxi,southwestern South China Block during Grenvillian.They probably defined as a part of archipelagic ocean system before South China has formed unified Rodinia during the Grenvillian orogeny.Cathaysia block and Yangtze block have experienced continent-continent collision orogenics behind this ocean basin subducted,and have formed unified Rodinia.

MORB和 IAT组合的出现说明位于华南板块西南端的广西云开地区在 Grenville期可能存在过洋盆，它们很可能代表了 Grenville期造山作用形成统一的 Rodinia超级大陆以前的一个&多岛洋盆&系统，华夏古陆和扬子板块可能在该古洋盆于新元古代早期发生的全球性 Grenville期造山运动而发生消减消失后才开始碰撞和造山，形成统一的 Rodinia超级大陆。

Pteridophytes have a longer evolutionary history and have endured greater losses of phylogenetical information than spermatophytes. Therefore, reconstructing the evolutionary history of pteridophytes has been a challenge to systematists.

蕨类植物是一群非常古老的植物，在其漫长的演化历史中丢失了大量的系统发生信息，因此重建其系统演化关系是蕨类植物学家所面临的重要任务之一。

Taxonomic Study on the Butterfly Subfamily Coliadinae (Lepidoptera: Pieridae) from China;2. Mitochondrial gene fragments of COⅠ and Cyt b of 24 species in the subfamily Pierinae and Coliadinaewere amplified and sequenced.

测定了粉蝶科的粉蝶亚科和黄粉蝶亚科14属共24种线粒体COⅠ和Cyt b基因部分序列，并从GenBank中下载了2种粉蝶的同源序列，以眼蝶科的2个物种为外类群，运用NJ法、贝叶斯法分别重建了分子系统树，探讨了它们的系统发生关系。

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。