The refuge contains the largest wintering population of elk in the world.

VOA: special.2009.02.16

By 1860 there were approximately 4,000,000 slaves in the United States, the second largest slave society slave population--in the world.

截至1860年,美国大约有,四百万的奴隶,也因此使之成为了,世界历史上的第二大奴隶社会

耶鲁公开课 - 美国内战与重建课程节选

We live in a world in which almost 50% of the population is under 35.

我们生活在这样一个世界,几乎50%的人口的年龄不到35岁。

普林斯顿公开课 - 人性课程节选

The higher intake of livestock products, the report says, is the result of rising population, urbanization and increasing affluence in many parts of the world.

VOA: standard.2010.02.22

First, to measure what a whole population eats, how in the world could you know that?

首先,去测量人群总体吃什么,到底该如何做

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

He says it is increasingly important to do this analysis in connection with urbanization because more than half of the world population lives in urban areas.

VOA: standard.2009.03.23

I want to say a little bit about the cost of vaccines because this is a part of what makes it difficult to accomplish what's usually our goal in a vaccine development, which is deliver the vaccine to every population in the world.

我想谈谈关于疫苗的成本,因为这是令我们的疫苗发展目标,无法得以实现的困难之一,这个目标就是将疫苗送至世界上每一个人

耶鲁公开课 - 生物医学工程探索课程节选

"The Japanese,in my opinion, are the healthiest population in the world."

VOA: standard.2010.02.23

Helping breeders quickly develop better varieties of all these crops will be crucial as the world population tops 9 billion by 2050 in the face of a changing climate.

VOA: standard.2010.02.01

Some economists say prices for rice, the staple food for much of the world's population, could be returning to levels that sparked inflation fears in much of Asia last year.

VOA: standard.2009.12.17

The U.N.Fund for Population Activity and the World Health Organization are working with national ministries of health in a global campaign to end fistula that now covers more than 40 countries in Sub-Saharan Africa, Asia,and the Middle East.

VOA: standard.2009.12.23