Quartz is quartz—a silicon ion surrounded by four oxygen ions—there's no difference at all between two-million-year-old Pleistocene quartz and Cambrian quartz created over 500 million years ago.
石英是石英——由四个氧离子围绕的硅离子——200万年前的更新世石英和5亿年前的寒武纪石英之间没有任何区别。
Research shows that the fit between an employee's values and a company's values makes a difference to what contribution they make and whether, two years after they join, they're still at the company.
研究表明，员工价值观与公司价值观的契合程度会影响他们对公司做出何种贡献，以及他们在加入公司两年后是否还留在公司。
Progress in this area can be measured by the difference in weight between buildings built now and those of comparable size built one hundred years ago.
通过现在修建的建筑物和在一百年前修建的具有相同规模的建筑物在重量上的差异，我们可以衡量出这一领域的进步。
30 years later, the BMI difference between urban and rural people in many countries had narrowed sharply.
30年后，许多国家城市和农村人口的 BMI 差异大幅缩小。
After years of observing human nature, I have decided that two qualities make the difference between men of great achievement and men of average performance—curiosity and discontent.
经过多年对人性的观察，我认为有两种品质决定了伟人和普通人之间的区别——好奇心和不满足。
There was a significant difference in paranoic ideation between the age group of 40-49 years and the normal group.
偏执因子在40-49岁组与正常对照有非常显著的差异。
The difference in life expectancy between the richest and poorest countries exceeds 40 years.
最富裕国家与最贫穷国家之间，期望寿命的差异超过40岁。
Nature, a difference of fifty years, had set a profound gulf between jean Valjean and Cosette; destiny filled in this gulf.
年龄相差五十岁，这在冉阿让和珂赛特之间是一道天生的鸿沟，可是命运把这鸿沟填起来了。
Then she came to America and for two or three years she taught us the difference between the nightingale that sings in the tree tops and the artificial bird that goes with a spring.
后来，她到了美国，两三年的时间里，她教我们见识了枝头唱歌的夜莺与靠一根发条发声的人造鸟之间的分别。
In considering the ten most significant inventions of the past 1,000 years, a subtle distinction must be made: the difference between "invention" and "discovery" is not as clear as one might think.
在考虑过去一千年中十大最伟大发明的时候，一定要注意“发明”和“发现”之间微妙的区别。很多人都不清楚这个。
When you think about what that adds up to over 20 years, you realise that it's hugely significant; in fact, it's equivalent to the difference between the US and Ethiopia.
如果你想想20年的时间那会是一个什么概念，你就知道它的影响非常之大；实际上，这种差异和美国与埃塞俄比亚的差异等同。
A lot of people are still ignorant of the advances online education has made in recent years and fail to recognize the difference between legitimate degrees and "diploma mill" certificates.
很多人还是忽视这几年网上教学取得的进步，并且对正规的学位和“文凭制造厂”的证书无法区分。
At the last three World Cups the average difference in goals per game between winning and losing teams has ranged between 1.2 and 1.3, as opposed to 1.7 some 30 years ago.
在过去三届的世界杯上，赢球球队和输球球队的进球数之差为1.2到1.3，而30年前为1.7。
But researchers who tracked 2,500 women over ten years found no difference between their brainpower before and during their pregnancies.
但研究人员对2500名女性进行的一项为期十年的跟踪调查发现，女性的智力水平在怀孕前和怀孕期间没什么差别。
But researchers who tracked 2, 500 women over ten years found no difference between their brainpower before and during their pregnancies.
但研究人员对2500名女性进行的一项为期十年的跟踪调查发现，女性的智力水平在怀孕前和怀孕期间没什么差别。
The difference between the two figures is $19,500; multiply it by 40 years, as the Census Bureau did, the result is $780,000.
二者平均年薪的差额为1.95万美元，再乘以40年（人口普查局就是这么干的），结果就是78万美元。
"The difference between rich and poor is getting so big," said Wu, a 32-year-old who started work as a cabbie 12 years ago. "if we compared our lives to the rich, we would die of heartbreak."
“贫富差距正变得越来越大”，吴这位开出租已有12年之久的司机说道：“要是把我们过的日子同那些大款相比，我们会羞愧的无地自容”。
The difference between five- and ten-year survival rates is relatively small (38% vs 35% in 2001-03) indicating that women who survive for five years after diagnosis have a good chance of being cured.
而5年生存率和10年生存率非常接近（在2001至03年比率分别是38%和35%）意味着确诊后生存了5年的妇女有更大的治愈机会。
After 10 years on the night shift, Jones said the pay difference between the daytime shift is worth the sacrifice. But many night shift workers pay a price in their health.
在上了10年夜班之后，Jones称他所获得报酬让他牺牲这十年的正常睡眠是值得的，但另外还有很多夜班工人为他们的健康付出了代价。
There was fifteen years or so difference in age between the two women.
这两个女性的年令相差大约十五岁。
What's the difference between a couple of years before and now?
跟数年前比起来，现在有什么不一样的？
The difference in time scale between the few hours his world has evolved and the billions of years wild nature has evolved is only part of the problem.
他的世界几个小时的进化，蛮荒大自然的数十亿年的进化，其时间尺度上的差别也只是问题的一部分。
This house would prohibit marriages between people with more than30 years' age difference.
应该禁止年龄差距大于30岁的人结婚。
This house would prohibit marriages between people with more than30 years' age difference.
应该禁止年龄差距大于30岁的人结婚。
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