The average population density of the world is 47 persons per square mile.
世界平均人口密度为每平方英里47人。
Newman notes that Portland has about the same population as Perth and had a similar population density at the time.
纽曼指出，波特兰的人口与珀斯大致相同，而且它们当时的人口密度相近。
County X and County Y have similar terrain, but the population density of County X is significantly higher than that of County Y.
X县和Y 县的地形相似，但 X 县的人口密度显著高于 Y 县。
The actual level of intensity depends on such factors as the physical layout, population density, and productive activities of a metropolis.
实际的强度水平取决于诸如大城市的物理布局、人口密度和生产活动之类的因素。
Medieval agriculture in northern Europe fed, clothed and sheltered a predominantly rural society with a much lower population density than it is today.
北欧的中世纪农业为主要的农村社会提供了食物、衣服和庇护，人口密度比今天低得多。
It's about population density.
这是个人口密度问题。
They found that brain size decreased as population density increased.
他们发现，大脑的尺寸随着人口密度的增长而减小。
It also cites the country's high population density as a reason for these strict measures.
它还援引该国人口密度高为采取严格的措施的理由。
There is a close correlation between population density and the number of fires in a given region.
一特定地区发生的火灾次数和该地区的人口密度密切相关。
"In fact, the data show that population density in the year 1500 predicts tightness today," Gelfand says.
Gelfand说：“事实上，1500年的人口密度数据就能够预测出今天该国文化类型的严格程度。”
This makes Malta the European country with the highest population density with 1,265 persons per square km.
这使马耳他成为欧洲人口密度最高的国家，每平方千米1,265人。
Neither socioeconomic status, latrine density, population density nor study year had a significant influence on disease risk.
社会经济状况、公厕密度、人口密度以及研究年份都未对患病风险产生重大影响。
City dwellers’ emissions per person tend to be lower, and the more planners can do to increase population density the better.
城市居民人均二氧化碳释放量更低，规划师越能提高人口密度，效果就越好。
European scientists asked volunteers to estimate statistics like the population density of Switzerland. Each person got five guesses.
欧洲科学家们让志愿者们估计一些诸如瑞士人口密度的数据，每个人有五次猜测机会。
Three of the cases they studied found that the rise of West Nile virus in the U.S. corresponded to decreases in bird population density.
他们在研究过的三个案例中发现西尼罗河热在美国的的流行与鸟类种群密度的下降相关。
But it might learn from Toronto, which emits 11.6 tonnes of carbon dioxide per person and is closer to Denver in climate and population density.
但是丹佛可以参考多伦多的做法，因为两座城市气候和人口密度更为相近，而多伦多的人均二氧化碳排放量只有11.6吨。
Haiti is a poor country with lax building standards and high population density, which makes buildings more likely to crumble, according to Blakeman.
据布莱克曼说，海地是个贫穷的国家，建筑标准松散，人口高度密集，其建筑更有可能倒塌。
I also recommend a visit to the Shanghai Museum of Urban Planning to anyone curious about population density, retail clusters or transportation infrastructure.
我还建议，对人口密度、零售集群或者交通基础设施感兴趣的人可以去上海城市规划馆参观。
Extreme weather events are also likely to have a more destructive effect in future decades, as population density increases due to reasons unrelated to climate change.
在未来几十年，因为与气候变化无关的原因使人口密度增加，极端气候事件可能更具破坏性。
Ni : Average population density in area i. To simplify the analysis, Earth’s surface is divided into a grid of squares i, and the distribution is assumed to be uniform in each.
Ni：指i区的平均人口密度，为了简化分析，地球表面被按照网格分成多个i区，每个区的分布假定是统一的。
Determining the location of photos also makes it possible to combine them with geographic data bases related to climate, population density, vegetation, topography and land use.
照片拍摄地的确定也使得将照片与天气，人口密度、植被、地形、土地等地理信息联系起来成为可能。
Rising human population density, combined perhaps with a cooling, drying climate, left the Natufian hunter-gatherers of the region short of acorns, gazelles and wild grass seeds.
人口密度的上升，结合其他如气候变冷变旱的因素，使采猎为生的纳图夫人(Natufian—约公元前1万年的史前人)短缺橡果、羚羊和野草种。
The estimated population is 15 million. The population density of Kazakhstan is among the lowest in the world, partly because the country includes large areas of inhospitable terrain.
哈萨克斯坦有1500万人口，是世界人口密度最低的国家之一，因为这个国家的国土包括了广大的荒芜地区。
The estimated population is 15 million. The population density of Kazakhstan is among the lowest in the world, partly because the country includes large areas of inhospitable terrain.
哈萨克斯坦有1500万人口，是世界人口密度最低的国家之一，因为这个国家的国土包括了广大的荒芜地区。
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