This division set the stage for allopatric speciation among populations of fishes and other marine species.
这种划分为鱼类和其他海洋物种的分区物种形成奠定了基础。
I was so impressed with the way you handle the microscope and the samples of onion cells, and with how carefully you observed and diagramed and interpreted each stage of cell division.
你操作显微镜和洋葱细胞样本的方式，以及对细胞分裂各阶段的仔细观察、描绘和解释，让我印象非常深刻。
With the advent of Joe Louis, who first gained national prominence in 1935 and became heavyweight champion two years later, the heavyweight division returned to center stage.
随着Joe Louis的横空出世，重量级别重返中心舞台。他在1935年第一次赢得国际声望，并且在两年后成为了世界冠军。
In order to provide a criteria for the stage division, the author gives a definition of exploration stage, division principles and its quantitive indications.
为了使划分阶段具有准则依据，作者提出了地勘阶段的定义、划分原则和区分阶段的定量标志。
Through the comparison and analysis, we can find our curriculum is deeply influenced by the traditional concepts, educational management, the mode of major division and the stage of social practice.
通过对比分析可以发现，我国硕士研究生课程受观念、教育管理传统、专业划分模式和社会实践平台等因素的影响很深。
Wilmut said there were so many failures because it was difficult to ensure that the empty oocyst and the donor cell were at the same stage of the cell division cycle.
威尔·马特说之所以有这么多的试验失败，是因为很难保证空卵囊和供体细胞能处在细胞分裂周期的同一阶段。
It industry enters cost competition stage that will cause the new international division of labor and re-organizes.
IT产业进入成本竞争阶段必然会引起新一轮的国际分工与重组。
Now, the international operation of Chinese enterprises is still in primary stage and the level of participating international division is lower.
目前，我国企业仍处于跨国经营的初级阶段，参与国际分工的水平还比较低。
It is shown that the stratigraphic division and correlation are effective and have high precision according to the characteristics of each stage of the community succession.
它们都是群落演替和取代的特殊阶段，所以，根据群落演替的各个阶段能比较精确地划分和对比地层。
Considering the present situation of shield tunneling on Beijing metro, the paper describes the construction stage division and the main points of engineering quality control for shield tunneling.
结合北京市地铁隧道盾构法施工的现状，对施工阶段的划分及各阶段的质量管理与控制要点进行阐述。
The methods that divide yield stages by using the best K division way and decide the stage Numbers based on the results of periodic analysis are conducted.
并提出用最优分割法划分产量阶段，结合周期分析结果确定产量阶段段数。
The flood events have self-similarity and fractal characteristic for certain duration, the fractal theory can be used to determine the division of flood stage.
洪峰散点序列在一定尺度范围内表现出了自相似性和分形特征，可用分形理论划分洪水分期。
The division of three-stage is useful for facing various error problems, and provides a theoretical platform and a foundation for the in-depth study of the combat error.
此三阶段的划分对于直面刑法中的各种错误问题，并且对于打击错误的深入研究提供了理论平台和基础。
Through ultra-structure observation, it is found that the microspore of Jin A began to abort at the stage of sporogenous cell division.
小孢子发育的超微结构观察发现，晋A不育系在造孢细胞增殖时期即表现出败育迹象。
The results showed that: (1) the auxocyte abortion of Jin a took place at the stage of sporogenous cell division.
结果表明，1晋a不育系雄性败育的主要时期是在造孢细胞增殖——小孢子母细胞形成时期。
The book also focuses on the division of quality supervision of construction stage, while on the highway, railway construction phase of the quality of supervision is described.
书中还重点介绍了分部工程施工阶段质量监理，同时对公路、铁路施工阶段质量监理作了叙述。
The results are as the following: 1. the best division points of demand interval in the case of two stage pricing and three stage pricing are respectively given.
其结果有二：第一，分别研究了垄断厂商二段、三段定价执行二级价格歧视的情形，并给出了需求区间的最优分段点；
Failure has often struck at the stage of meiosis, a type of cell division during which paired chromosomes swap DNA and the number of chromosomes per cell is halved.
减数分裂是在配对的染色体交换DNA和细胞内染色体数目减半时的一种细胞分裂。
Failure has often struck at the stage of meiosis, a type of cell division during which paired chromosomes swap DNA and the number of chromosomes per cell is halved.
减数分裂是在配对的染色体交换DNA和细胞内染色体数目减半时的一种细胞分裂。
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