The sun is relatively young, part of a generation of stars known as Population I, which are relatively rich in elements heavier than helium.

太阳相对来说还年轻，属于我们所谓的i类恒星，这类恒星中的比氦重的元素相对丰富一些。

youdao

For many years I have studied global agricultural, population, environmental and economic trends and their interactions.

多年来，我一直在研究全球农业、人口、环境和经济趋势及其相互作用。

youdao

I mean, as the population grows and there are more vehicles on the roads and there's more machinery, surely they can't depend so much on sugar cane?

我是说，随着人口增长，路上车辆更多了，机械也更多了，他们肯定不能只依赖于甘蔗（作为生物燃料）吧？

youdao

Yet treatments and population growth mean that more people than ever are living with H.I.V.

VOA: special.2009.12.08

But what you've got at the top are the early 1790s and I think 1820 in terms of slave population in the American south.

一般,你们会认为南方的奴隶数量,达到高峰是在十八世纪九十年代,而我却认为1820年更准确

耶鲁公开课 - 美国内战与重建课程节选

I feel like the population in the United Kingdom is not quite as diverse as the United States.

我感觉英国的人口不像美国那么多元化。

多民族城市，伦敦 - SpeakingMax英语口语达人

After that, I layered in some population data (I chose April 2000) to get a gun death rate normalized for population size.

FORBES: Gun Death Data Points In Both Directions

Watlington, which combined the distinction of being the smallest town in England with having more pubs per head of the population than I believed possible.

FORBES: Thoughts... On Drinking

It's a huge undertaking financially and population-wise I suppose we're not considered to be the most populated area.

BBC: Work to clear landslide from road