4.population- the number of inhabitants (either the total number or the number of a particular race or class) in a given place (country or city etc.); "people come and go, but the population of this town has remained approximately constant for the past decade"; "the African-American pop...
Citation Context ...he current trend, the current number of approximately 1 billion people worldwide living in slums and informal settlements is expected to rise by 1.6 billion by the year 2020 and to 2 billion by 2030 (=-=UN-HAB... Mario Artuso - 《Urban Research & Practice》 被引量:...
Researchers were able to shift the teens’ bedtime by an hour and a half earlier, and their total sleep time increased by approximately an hour. “The interesting thing is that teens with late circadian clocks shifted by up to two hours earlier,” Crowley said. “And the teens who had an...
Gun violence spills over, while the government's control policies are ineffective. There were at least 654 mass shootings in the United States in 2023. Approximately 43,000 people were killed by gun violence in 2023, averaging 117 deaths per day. Driven by partisan polarization and interest grou...
Linguistsstudiedapproximately37,000wordsacrossfivedifferentlanguages(English,Spanish,Dutch,German,andPolish)tofigureouttheconnectionbetweenthesoundsthatwerepronouncedandtheemotionsthatwereexpressedinallfivelanguages.语言学家对五种语言(英语、西班牙语、荷兰语、德语和波兰语)中的约37000个单词进行了研究,以分析这些语言...
On Nov 15, 2022, the world's population is projected to reach 8 billion people, a milestone in human development. 联合国《世界人口展望2022》报告 图源:联合国网站 从70亿到80亿,用了多久? 联合国网站显示,全球人口从70亿增长到80亿花了约12年时间,而到2037年达到90亿将需要大约15年的时间,这表明全...
Demographichistorycanbedividedintotwomajorperiods:atimeoflong,slowgrowthwhichextendedfromabout8,000BC.tillapproximatelyAD.1650.Inthefirstperiodofsome9600years,thepopulationincreasedfromsome8millionto500millionin1650.Between1650andthepresent,thepopulationhasincreasedfrom500milliontomorethan4billion.Anditisestimatedthat...
Population aging is a significant medical and social dilemma [1]. As of 2020, the global population of individuals classified as elderly has reached 99, and it is projected that by the year 2050, the elderly population will approach approximately 90 million. This tendency is expected to increase...
Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories(卡路里) per hour, which is approximately twice as many as they would burn walking, although fewer than running, which...
and the technology divide. the human development index has declined for the first time in 30 years. the world's poor population has increased by more than 100 million, and nearly 800 million people live in hunger. the security deficit...