Students of human migration speak of "push" and "pull" factors, which influence an individual's decision to move from one place to another.
研究人类迁移的学生们谈到“推”和“拉”因素，这些因素会影响个体是否会从一个地方迁移到另一个地方。
Selectivity of human migration long been the focus of demographers and economists.
人口迁移的选择性一直以来都是人口学家和经济学家关注的焦点。
Selectivity of human migration has long been the focus of demographers and economists.
人口迁移的选择性一直以来都是人口学家和经济学家关注的焦点。
About 230m Chinese are expected to take part in the world's biggest annual human migration.
预计约有2.3亿人将参加世界上规模最大的年度迁移。
Many scientists viewed them as a failed human migration from Africa, with no genetic connection to humanity today.
许多科学家认为，它们代表了人类走出非洲的一次失败尝试，与今天的人类没有基因联系。
Mining and human migration there threaten critical habitat for the okapis, but for now, they persist in quiet mystery. —Amanda Fiegl
那里的采矿业和人们的迁居威胁到霍家狓极其重要的栖息地，但是就目前而言，它们依然保持着低调神秘。
The IOM says we're living in an era of the greatest human migration in recorded history, calling it one of the defining features of the contemporary world.
国际移民组织说我们生活的这个时代据历史记载是拥有移民数目最庞大的时代，我们称作这是我们当代世界的定义特征之一。
For most people who have never been to China, the Spring Festival - which creates the world's largest human migration annually - is difficult to comprehend.
中国的春节创造了世界上最大规模的人类迁徙活动，每年如此。对于大多数没有到过中国的人来说，真的很难理解。
Human behaviour, however, is having a detrimental impact on animal migration.
然而，人类行为正在对动物迁徙产生不利的影响。
Climate change will have major consequences for food production, water availability, ecosystems and human health, migration pressures, and regional instability.
气候变化将带来食品生产，可用水，生态系统以及人类健康，迁移压力，地区不稳定性方面的重大后果。
The movie puts a human face on this migration by showing its affects on a single family.
本片通过展现春运对单个家庭的影响，体现了导演对春运的人性思考。
Atkinson's best-fit model parallels not only the overall genetic pattern, suggesting an out-of-Africa migration of modern humans, but also subsequent events in human prehistory.
Atkinson提出的最合适的模型不仅和大致的基因的图式一致，即认为现代人类是来自非洲的移民后代，而且和人类史前时期的一系列的事件相吻合。
Regional labor migration boosts the development and utilization of China's human resource, and it is good for economic exchange and cooperation in Northeast Asia.
通过区域内劳动力迁移，促进我国人力资源的开发和利用，有利于进一步推动东北亚区域的经济交流与合作。
STEM121 detects migration and differentiation of transplanted human neural stem cells in the hippocampus of a mouse brain.
STEM 121检测移植的人神经干细胞在小鼠脑的海马中的迁移和分化。
Nevertheless, ancient DNA can undoubtedly be a useful and necessary tool to unveil the mysterious migration history of human beings.
但是毫无疑问，古代dna研究是揭开人类历史神秘面纱非常有用且必不可少的工具。
Migration narrows the gap in human capital among the cities, especially the gap between Shanghai and the other 15 cities of the Yangtze River Delta.
研究还发现，就业迁移导致长三角人力资本城际差异缩小，尤以上海与其他15城市的差距缩小更为明显。
Migration will provide the human resources needed in the development of western China. It can promote the industrial transition and increase new employment.
人口迁移有利于西部地区获得急需的人力资源、促成产业的转换与就业的增加和观念的更新。
Vast multitudes of specialized human capital persistently flow and show a developing trend of massive transnational migration in the process of international collocating of human capital.
在人力资本的国际配置中，大批人力资本持续流动，呈现出大规模跨国迁移的发展趋势。
From the endogenesis population migration model, we also implement the empirical analysis of interprovincial human capital migration on economic growth effect.
第三，以人口迁移为指标，基于内生人口迁移模型，对各省区省际人力资本迁移的增长效应进行了实证分析。
Objective To investigate the role of TROP2 in migration and invasion of human gastric cancer cells.
目的探讨TROP2基因在胃癌细胞迁移侵袭过程中的作用。
Objective to explore the effect of chemokine SDF-1 on the proliferation, migration and in vitro of human endothelial progenitor cells (EPCs).
目的观察趋化因子sdf- 1促内皮祖细胞增殖、迁移和管型形成的作用。
AIM: To investigate the effects of transfected JWA ribozyme gene on phenotype and migration of human pulmonary artery smooth muscle cells (PASMCs).
目的：探讨JWA核酶基因转染对肺动脉平滑肌细胞表型及迁移的影响。
This article argument the time and space scale of it, response of different region and the effect it makes to human evolution and culture migration.
试从突变事件的时空尺度，区域响应，以及它对人类进化和文化变迁的影响等几个方面来论述。
Objective: the aim of the present research is to study the selectivity of Mitomycin on human umbilical vein endothelial cells (HUVEC) function and cell migration and the mechanism was also discussed.
目的：观察丝裂霉素对人脐静脉血管内皮细胞(HUVEC)作用的选择性和细胞迁移能力的影响及机制研究。
Analysizing the way of migration and transform of the metallic elements of the gangue in the environment, its toxic effects to the organism and influence on human health are important significance.
分析煤矸石中这些金属元素在环境中的迁移转化途径及其对生物体的毒性效应，对人体健康影响的研究具有重要意义。
The results taken together indicated that HAI-2 plays an inhibitory role in cancer cell invasion and matriptase activation while HAI-2 can promote cell migration of human prostate cancer cells.
综合以上结果，我们认为，HAI-2在人类摄护腺癌细胞的侵袭转移以及间质蛋白酶的活化上扮演抑制的角色，但可提升细胞迁移能力。
The receptor has important function on mediating migration, survival, growth and vasculogenesis of the human malignant glioma cells.
该受体在介导人恶性胶质瘤细胞的迁移、存活、生长及血管发生中起重要作用。
The receptor has important function on mediating migration, survival, growth and vasculogenesis of the human malignant glioma cells.
该受体在介导人恶性胶质瘤细胞的迁移、存活、生长及血管发生中起重要作用。
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