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。

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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。

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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。

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The researchers found a 14-year difference in life expectancy between Asian-American and African-American men who can expect to live an average of 67 years.

VOA: standard.2010.04.08

This was eventually taken out, and actually just for your interest, there was no overlap between the time when cocaine was in Coca Cola and lithium was in 7-Up, so there was a few years difference between those two times, but it's amazing to think about what does go into processed foods.

锂最终被去掉了，如果你感兴趣的话，可口可乐中含有可卡因,与七喜中含锂的时代,并没有交集，它们之间还差了几年，但是想一想加工食品里,会加入什么东西还是很令人吃惊的。

麻省理工公开课 - 化学原理课程节选

Where both twins had the disease, there was an average of 3.66 years difference in age at onset between 25 sets of identical twins, and 8.12 years difference between 20 sets of fraternal (dizygotic) twins, suggesting genes had a role in determining when Alzheimer's was seen.

BBC: NEWS | Health | Alzheimer's risk 'is 80% genetic'

Most of them are, but they have been splitting the difference for years between value (i.e. price and positioning) and volume (i.e. percent of inventory sold).

FORBES: Digital Advertising's Chaotic Evolution

You'd probably age more quickly so there'd be less difference between us in a few years.

WSJ: Review: Mint has a subtle revival of 'Katie Roche'