Over half of the human population lives within 100 kilometres of the sea . most of this population lives in urban areas that serve as seaports 全球有超过一半人口居住在沿海100公里的范围以内，其中大部份住在海港附近的城市区域。
Gauged against our one - and - a - half century of urban history , our built - up acreage , and our human population , we are in fact quite deprived in terms of outstanding trees 纵观百多年的都市历史、市区及人口变化，突出的市区树木实在寥寥可数。
“ it ' s a question of whether you can put the whole human population at risk in order to treat some individuals . it ' s a difficult ethical question “这是一个你能否为了给一些人治病而将全部人口都置于风险之中的问题。这是一个很难解答的伦理问题。 ”
The past 10 , 000 years have seen rapid skeletal and dental evolution in human populations , as well as the appearance of many new genetic responses to diet and disease 在过去的一万年间，人类的骨骼和牙齿的进化很快，遗传基因也对饮食和疾病作出了反应。 ”
Why has this new aspect of security only recently been recognized ? two trends tell the tale . first is the exponential growth of the human population 但是我们对国家安全的定义是著眼于人民的日常生活，并不只限于国家的军事安全，人民的经济福祉也包括在内。
Though no human population is native to antarctica , about 1 , 000 people work there in the summer months , and another 12 , 000 tourists visit every year 虽然南极洲没有土著居民，但每年夏季的几个月里，约有1000人在那儿工作，另外还有约12 ， 000名游客来此参观。
Studies in human populations link cancer risk to infectious agents , such as human papillomairus ( cerical cancer ) and hepatitis b ( lier cancer ) ( 1970s and 1980s ) 在人群中研究传染病原与癌风险的关系,如人乳头瘤病毒(宫颈癌)和乙型肝炎病毒(肝癌) ( 70年代到80年代)
Studies in human populations link cancer risk to infectious agents , such as human papillomavirus ( cervical cancer ) and hepatitis b ( liver cancer ) ( 1970s and 1980s ) 在人群中研究传染病原与癌风险的关系,如人乳头瘤病毒(宫颈癌)和乙型肝炎病毒(肝癌) ( 70年代到80年代)
With the rapid growth of human population , much space once belonging to wildlife has been either occupied or destroyed in the process of industrialization and urbanization 随着人口的快速增长，在工业化和城市化的过程中，曾经属于野生动物的空间被人类占据或者破坏了。
However , china ' s biodiversity has suffered heavy losses resulting from human population growth , economic development and environmental pollution as well as ecological destructions 然而，人口急剧增长和经济的快速发展，以及环境污染和生态破坏，使生物资源面临严重威胁。
