How could Pluto hold onto its extended layer of gases over the 4.5 billion year age of the solar system?
在太阳系45亿年的历史中，冥王星怎么来约束自己的大气层？
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。
But the stars in the two galaxies cataloged as NGC 4038 and NGC 4039 don't collide in the course of the ponderous, billion year or so long event.
但在这持续十亿年的事件中，两个编号为NGC 4038和NGC 4039的星系中的恒星没有相撞。
From a vantage point outside our home, a revealing perspective has shown us the planet for what it really is; a ball of living star dust, a four-and-one-billion year old miracle.
从地球以外的有利地位来看，地球是一个有生命的、虚无缥缈的球体，一个有着50亿年生命的奇迹。
That common-sense change enjoys wide public support and would save the USPS 2 billion per year.
该项变动符合生活常理，得到了公众的广泛支持，每年将为美国邮政节省20亿美元。
The cost we project for saving civilization would amount to less than $200 billion a year, 1/6 of current global military spending.
我们预计每年用于拯救文明的开支合计不到2000亿美元，相当于目前全球军费开支的六分之一。
Yet the cost we project for saving civilization would amount to less than $200 billion a year, 1/6 of current global military spending.
然而，我们预计每年用于拯救文明的开支合计不到2000亿美元，相当于目前全球军费开支的六分之一。
The largest firms in America and Britain together spend more that 15 billion a year on CSR, according to an estimate by EPG, a consulting firm.
根据咨询公司EPG 的评估，美英两国最大型的公司每年在企业社会责任层面上投入共计超过150亿美元。
It is estimated that to meet the 2050 challenge, investment must double to 83 billion US dollars a year.
据估计，为了应对2050年的挑战，投资必须翻一番，达到每年830亿美元。
Americans, she finds, buy roughly 20 billion garments a year—about 64 items per person—and no matter how much they give away, this excess leads to waste.
她发现，美国人每年大约购买200亿件衣服，大约每人买64件，不管他们送出去多少，这种过剩都会导致浪费。
When we examine expenditures for research, we find that of the more than $35 billion spent each year in this country, almost two-thirds is spent by the federal government.
当我们检查研究支出时，我们发现，在我国每年花费的350多亿美元中，几乎三分之二是由联邦政府支出的。
France is facing potentially more than one billion dollars in lost revenue this year, due to huge declines in tourism.
由于旅游业收入的大幅下滑，法国今年可能面临超过10亿美元的收入损失。
France is facing potentially more than one billion dollars and lost revenue this year, due to huge declines in tourism.
由于旅游业的大幅下滑，法国今年可能面临超过10亿美元的收入损失。
With more than $12 billion in sales this year, the industry is booming and, according to the market research company, Grand View Research, is on track to sell billions more by 2025.
该行业今年的销售额超过120亿美元，正在蓬勃发展。根据市场研究公司GrandViewResearch 的数据，到2025年，该行业的销售额有望再增加数十亿美元。
It reported a net loss of $5.6 billion for fiscal 2016, the 10th straight year its expenses have exceeded revenue.
据报道，2016财年净亏损为56亿美元，连续第10年入不敷出。
There are 2.2 billion cell-phone users worldwide, a total that is growing by about 25% each year.
全球有22亿手机用户，这个数字每年以大约25％的速度增长。
There are 2.2 billion cell phone users worldwide, a total that is growing by about 25% each year.
全球有22亿手机用户，这个数字每年以大约25％的速度增长。
The idea is that around the year 1800 CE the human population became large enough, around a billion people, that its activities started altering the environment.
这种想法出现于公元1800年左右，当时人口变得足够多，大约有10亿人，人类的活动开始能够改变环境。
Salespeople hand out hundreds of dollars' worth of samples each week—$7.2 billion worth of them in one year.
销售人员每周分发价值数百美元的样品——一年中它们的价值达到72亿美元。
The English language teaching sector directly earns nearly &1.3 billion for the UK in invisible exports and our other education related explores earn up to 10 billion a year more.
在无形的出口中，英语培训行业为英国直接赚取了将近13亿英镑，而其他与教育相关的出口一年则可以赚多达100亿英镑。
The English language teaching sector directly earns nearly &1.3 billion for the UK in invisible exports and our other education related explores earn up to &10 billion a year more.
英语教学部门直接为英国赚取了近13亿英镑的无形出口收入，而我们其他与教育相关的探索每年多赚100亿英镑。
Yet spending on ads carried over cell-phone networks last year amounted to just $1.5 billion worldwide, a fraction of the $424 billion global ad market.
然而，去年全球手机网络广告支出仅为15亿美元，仅占全球广告市场总额4240亿美元的一小部分。
Online shopping has become a major force in retailing this year with more than US$1 billion in Christmas season sales, industry analysts say.
行业分析师说，网上购物在今年零售业超过10亿美元的圣诞节销售中已成为主要力量。
The market for products designed specifically for older adults could reach $30 billion by next year, and startups want it on the action.
专门为老年人设计的产品市场在明年可能达到300亿美元，初创公司希望能够将其落实。
The market for products designed specifically for older adults could reach $30 billion by next year, and startups want in on the action.
专为老年人设计的产品的交易额在明年可能达到300亿美元，一些初创公司也想参与进来。
Facing an $8.3 billion budget deficit this year, closing post offices is one of several proposals the Postal Service has put forth recently to cut costs.
面对今年83亿美元的预算赤字，关闭邮局这一做法是邮政总局为精简开支所提出的若干建议中的一条。
By 2007, DuPont was saving $2.2 billion a year through energy efficiency, the same as its total declared profits that year.
到2007年，杜邦公司通过提高能效一年节省22亿美元，和它那年公布的总利润一样多。
The oldest Disney theme park receives over 14 million visitors each year, nearly $3 billion in revenue.
最老的迪士尼主题公园每年接待超过1400万游客，收入近30亿美元。
Today, energy storage is a $33 billion global industry that generates nearly 100 gigawatt-hours of electricity per year.
如今，能源储存是价值330亿美元的全球化产业，每年产生近1000亿瓦时的电力。
Today, energy storage is a $33 billion global industry that generates nearly 100 gigawatt-hours of electricity per year.
如今，能源储存是价值330亿美元的全球化产业，每年产生近1000亿瓦时的电力。
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