可能在人口流动性方面最具说服力的标志是，公元前3000年，在这片广袤的土地上大部分牧民讲的相关语言，现代印欧语系就从中发展而来。
Perhaps the most striking sign of mobility is the fact that by the third millennium B.C., most pastoralists in this huge region spoke related languages ancestral to the modern Indo-European languages.
我们的人口流动性很大。
美国人口流动性很高，有能耐的人会迁移向其他所得税低的州。
Americans are highly mobile, so the most able will simply leave for another state.
另外美国地域广大，人口流动性也高，而且朋友之间绝少吐露私人的事情。
In addition the United States a vast area, population mobility is also high, and friends rarely tell private matter.
随着人口流动性的与日俱增，年轻人走出家门去追求更好的教育和工作机会。
With the growing mobility of the population, young people are leaving home to pursue better education and career opportunities.
与此同时，家庭结构的变迁、人口流动性的加大，传统的家庭照顾模式又面临挑战。
The increasing of nuclear family as well as floating population damages the traditional family support to elderly.
之所以在中国做这个调查，是因为中国当时的人口流动性不大，地区性疾病和饮食有明显特点。
He conducted the study in China because at the time the Chinese population wasn't very mobile, so there were obvious characteristics in regional disease and diet that could be observed.
实际上，人口流动性变差早已经成为战后美国经济的一个特征。造成这一现象的原因是劳动力衰老以及房价上涨。
Declining mobility has in fact long been a feature of the post-war American economy, thanks to the ageing of its workforce and rising rates of home ownership.
随着印度的农村人口流动性的加强以及种姓等级观念束缚不再那么严格，这样的看法很可能会逐渐消失。
As rural Indians become more mobile and less caste-bound, such attitudes are likely to fade.
随着人口流动性的与日俱增，年轻人走出家门去追求更好的教育和工作机会。这个趋势正在挑战中国以家庭为基础的传统。
With the growing mobility of the population, young people are leaving home to pursue better education and career opportunities. This trend is challenging family-based traditions.
与其他人口相比，老年人更有可能拥有自己的房子，他们的流动性也比租房的人小，因为后者可能转移到新的就业市场。
Compared with the rest of the population, older people are also more likely to own their own homes and be less mobile than renters, who can move to new job markets.
这座城市一直以来都有大量的外国出生人口（1990年比例为26.5%），进一步增强了人口多样性。哈佛大学和伯克利大学的经济学家认为，这预示着良好的流动性。
The city had a large foreign-born population (26.5 percent in 1990), leading to broader diversity, which, the Harvard and Berkeley economists say, is a good predictor of mobility.
美国一直是一个流动性很强的国家，但美国人口普查局的最新数据显示，美国的人口流动率已降至有记录以来的最低水平。
The US has always been a remarkably mobile country, but new data from the Census Bureau indicate that mobility has reached its lowest level in recorded history.
目前的明显问题有：人口外流，房价大幅贬值，缺乏流动性，被遗弃的地产及对社区的影响等。
There's the obvious problems of spillovers, cascading housing price depreciation, lack of mobility, abandoned properties and the effects on neighborhoods, etc.
人口的流动性大大增加。
大型公共活动人口密度大、流动性强，极易引发安全事故，造成大量人员伤亡和恶劣社会影响。
Large public activity has the character of big population density and strong fluidity, which is liable to safety accident and causes big casualties and social impacts.
外来人口犯罪的原因有流动性大、亚文化特征影响、管理不足、生活状况较差等特征。
The reasons for immigration crime include high mobility, impact from sub - cultural characteristics, inadequate management, poor living conditions and so on.
我们城市的人口，常常是流动性的。
实际上，国内外很多学者也从不同的角度研究了流动性人口问题。
In fact, many scholars, domestic and foreign, also have studied the fluid population question from different aspects.
只有也门的人口，因其流动性小，人口年轻化更严重。
Only the population of Yemen—hardly a model of stability—is more youthful.
不过当今人才和资本的流动性正在加大，那些老龄人口所带来的人口压力也似重担压在肩头，越来越臃肿的国家无法永久支撑下去，它的生命将走到尽头。
But talent and capital are getting more mobile; and the demographic pressure of those ageing populations is mounting. The ever larger state cannot go on for ever. It will stop.
人口统计学家试图预测社会流动性。
人口统计学家试图预测社会流动性。
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