Evolutionary time, in which 6,895 days represent a mere.000000005% of the 3.5 billion year history of life on Earth.

演变着的时间——6895天仅仅相当于地球35亿年历史的0.00000005%。

youdao

The entire universe was, therefore, a nonhabitable zone for perhaps the first few billion years of its 13.7-billion-year history.

在宇宙一百三十七亿年的历史中，大概在前几个十亿年里，整个宇宙都无法让生命生存。

youdao

The prospect of billion-year storage is fascinating and a little terrifying.

数据储存数十亿年的愿景令人着迷却又有点可怕。

youdao

They criticized a proposal for industrialized nations to pay developing countries ten billion dollars a year over three years.

VOA: special.2009.12.12

Same. -Lower Our trade and balance is now about 300 billion a year ? three years from now, higher, lower or the same?

持平，-减少,我国每年的国际收支逆差为3，000亿,3年后，是增加，减少还是持平？

斯坦福公开课 - 经济学课程节选

The amount that we're spending for the year ending June 30,2008 is $843 million -that represents 37% of revenues--and we're projecting expenditures for the following year of $1.15 billion.

截至20008年6月30日,我们的年支出是8亿4千3百万美元,占了收入的37%,我们明年的支出预算是11亿5千万

耶鲁公开课 - 金融市场课程节选

We're giving 50 billion a year in aid to all the developing countries around the world, and we're giving 350 billion a year in subsidies to agricultural producers.

BBC: News | BREAKFAST WITH FROST | President of the World Bank James Wolfensohn

Of course, during most of that 4.5 billion year history, the earth was not populated by intelligent life -- human beings who might have noticed the two events happening on the same day.

CNN: A meteor and asteroid: 1 in 100 million odds

The confirmation, based on analysis of 10 billion year-old dying RR Lyrae stars in the Gemini constellation, was done by an international team of astronomers who report their findings in The Astrophysical Journal.

FORBES: Astronomers Confirm Milky Way's Most Distant Stellar Stream