单词：natural migration of population
单词：natural migration of population 相关文章
The U.S. population is increasing at nearly one percent a year, making the United States the world's fastest growing industrial nation. 美国人口正以每年将近1%的速度增长，这使美国成为世界人口增长最快的工业化国家。
VOA双语新闻 Bilingual News
According to the 2010 World Population Data Sheet, there will be fewer workers to support an aging population in the coming decades. The booming population growth of the past century has slowed, but improving health conditions and stubbornly high bir
VOA标准英语2010年(七)月
[00:01.55]People need basic necessities [00:04.15]such as food,clothes and houses. [00:08.52]This means that more of our natural resources [00:11.87]like oil and coal are used [00:14.98]up to produce these things. [00:17.55]Also, more of our environm
外研社新标准初中英语九年级
By Mike O'Sullivan Los Angeles 08 March 2006 watch US Population report Census officials say the U.S. population will reach 300 million in October, and that the 300th million American may well be a La
2006年VOA标准英语（三月）
Third Great Migration Might be in Progress In the early 20th Century, more than two million African-Americans left their homes and small farms in the South and moved to northern industrial cities to escape overt racism and search for better work and
VOA标准英语2011年(七月)
By Zulima Palacio Washington 17 September 2009 World population is growing - highest in underdeveloped countries A new report indicates that, in less than two years, global population will reach seven billion people, a number that imposes new challe
VOA标准英语2009年(九月)