缓慢的、持续的变化可能是环境稳定时期的常态，而新物种的快速进化发生在环境压力时期。
Slow, continuous change may be the norm during periods of environmental stability, while rapid evolution of new species occurs during periods of environment stress.
研究人员还探索了如果消费者用具有多种功能的新电子产品取代旧产品将会发生什么。
The researchers also explored what would happen if consumers replaced old products with new electronics that serve more than one function.
据说动物的社会学习是在直接或间接的社会互动促进获得新行为时发生的。
Social learning in animals is said to occur when direct or indirect social interaction facilitates the acquisition of a novel behavior.
由于他是在中西部发表演讲，他决定先说明美国历史上最严重的地震不是发生在加利福尼亚或阿拉斯加，而是1811年在密苏里州的新马德里。
Since he was speaking in the Midwest, he decided to begin by noting that the most severe earthquake in American history took place not in California or Alaska but at New Madrid, Missouri in 1811.
明尼苏达大学和蒙特利尔的麦吉尔大学的一项新研究着眼于这种衰退发生的区域和程度。
A new study by the University of Minnesota and McGill University in Montreal looks at where, and how far, this decline is occurring.
盟军部队明天开始演习，来展示一旦发生新的入侵，军队能以多快的速度集结起来。
Allied troops begin manoeuvres tomorrow to show how quickly forces could be mobilized in case of a new invasion.
当新的参与者出现时，会发生什么呢？
当新的参与者出现时，他们在现有文化中没有深厚的根基，会发生什么？
What happens when new players emerge, who don't have deep roots within the existing culture?
一些英国医生指出，新硬币投入使用后不久，就发生了英国最严重的流感浪潮之一。
Some British doctors have pointed out that one of Britain's worst waves of influenza happened soon after the new coins came into use.
共享经济也可能发生同样的情况，这也为企业提供了新的机遇。
The same may happen with the sharing economy, which also provides new opportunities for enterprise.
北大西洋公约组织后来承认，在搁浅发生时，他们正在同一海域测试新的声纳技术。
NATO later admitted it had been testing new sonar technology in the same area at the time as the strandings had occurred.
那天下午，玛丽注意到科林的房间里发生了一些新的事情。
That afternoon Mary noticed that something new had happened in Colin's room.
而且，每次新的变革所发生的时间间隔越来越短。
What's more, each new change comes after a shorter and shorter time.
如果发生军事冲突，很可能会带来各种新的词汇。
If there's a military conflict, that may well bring all sorts of new words to the fore.
因此，它的活动相对于新环境的外部循环发生了转移。
As a result, its activities are shifted relative to the external cycle of the new environment.
然而，在新千年伊始，资源规划者对水资源的看法开始发生变化。
At the outset of the new millennium, however, the way resource planners think about water is beginning to change.
一种新的毛发生长药物每毫克的售价是该价格的三倍，就如该药物的制造商对另一种含有同样活性成分的产品的售价一样。
A new hair-growing drug is being sold for three times the price, per milligram, as the drug's maker charges for another product with the same active ingredient.
即使在感染你的时候，感冒病毒也会发生变异，而且新的病毒毒株经常出现，以至于当制药商研制出针对其中一种变异的疫苗时，血清已经过时了。
Colds mutate even while they're infecting you, and new strains pop up so often that by the time drug-makers create a vaccine against one variation, the serum is already out of date.
现在新的研究表明，在过去几年里，这种情况已经发生了。
New research now suggests that has already happened over the past years.
如果采用了新的安全系统，事故就不会发生了。
If the new safety system had been put to use, the accident would never have happened.
当你睡觉时，你的大脑会整理白天发生的一切，试图将新的经历与旧的记忆联系起来。
When you sleep, your brain sorts through everything that happened during the day, trying to link new experiences to old memories.
你每在英语课上学一个新单词，每解决一个数学问题，每学会唱一首新歌，你大脑中的神经元网络就会生长，大脑就会发生变化。
For every new word you learn in your English lesson, every problem you solve in maths, every new song you learn to sing, a neuronal network grows in your brain and the brain changes.
一项新的研究发现，大多数三岁的孩子都能记得很多一年前发生在他们身上的事情，在他们5岁到6岁的时候，这些记忆仍然清晰，但当他们超过7岁时，这些记忆就会迅速变弱。
A new study has found that most three-year-old children can remember a lot of what happened to them a year earlier, and these memories are still clear while they are 5 and 6, but by the time they are over 7, these memories become weaker rapidly.
如果国会也采取强硬的“现收现付”规则，要求用新的税收或预算削减来抵消增加的支付给供应商的费用，这种情况发生的可能性就会小得多。
That is far less likely to happen if Congress also adopts strong "pay-go" rules requiring that any increase in payments to providers be offset by new taxes or budget cuts.
当这种情况发生时，许多树，如核桃树、橡树和松树，完全依靠所谓的“分散贮藏者”，如鸟类，将它们的种子转移到新的地方。
When that happens, many trees like walnuts, oaks and pines, rely exclusively on so-called "scatter hoarders", such as birds, to move their seeds to new localities.
发生新的困难。
它可能为探讨病毒发生病的发病机理和治疗提供新的方法。
It may provide a new methods for probing the pathogenesis and treatment of the virogenetic pathema.
更多这样的集体自催化集可以演变为新集，所以演变可能发生。
More such collectively autocatalytic sets can evolve to novel sets so evolution can occur.
研究这些目录时，可能会对创建新目录时发生的所有动作感到吃惊。
As you explore these directories, you may be amazed at all the action that occurred when you created the new directory.
如果发生这种情况，就需要新井和新管道来继续固碳工程。
If this happens, new Wells and pipelines would be required to continue the sequestration project.
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