This ancestral species might have evolved at a time when the islands were connected.
这种祖先物种可能是在岛屿相连的时候进化而来的。
This occurs at a time when other nations have made significant gains in their own research capabilities.
这种情况发生在其他国家自身科研能力取得重大进展的时候。
Members of the Academy hoped that this might encourage the Royal Family to keep the Academy open at a time when many in the government were considering closing it.
学院的成员们希望，在许多政府成员考虑关闭学院的时候，这会鼓励皇室保持学院开放。
Scientific publishers routinely report profit margins approaching 40% on their operations at a time when the rest of the publishing industry is in an existential crisis.
当其他出版商陷入生存危机之际，科学出版公司的运营利润率却如往常一样接近40%。
Some are turning to the internet, which is cheaper and offers concrete measurements like click-through rates—especially important at a time when marketing budgets are tight.
有些人转向了互联网，因为它更便宜，而且提供了诸如点击率这样的具体统计结果，这在营销预算紧张的时候尤为重要。
He might feel that leveraging the company at a time when he sees tremendous growth opportunities would be a mistake.
他可能感觉到在看到巨大的发展机会时举债经营公司是一个错误。
At a time when beards meant a great deal religiously, he's telling the men to shave off their beards.
在那个时代，胡子在宗教上有非常重要的意义，他告诉男人们剃掉他们的胡子。
Why protect chlorophyll at a time when the tree is breaking it down to salvage as much of it as possible?
在树木将叶绿素分解，以尽可能多地将其回收的时候，为什么我们还要保护叶绿素呢？
That, at least, is some comfort at a time when our national economy seems to be searching for its next story line.
当下，我们的国民经济似乎正在寻找下一个“故事情节”，这至少是一种安慰。
Paying kids for housework is one of the most popular topics, especially at a time when everyone is more careful about money.
为孩子做家务付钱是最流行的话题之一，尤其是在这个大家都对钱都更谨慎的时代。
It is advantageous for a kangaroo female to produce young at a time when plant productivity is sufficient to support her offspring.
袋鼠雌袋鼠在植物繁殖力充足的时候生育后代是有利的。
Linguists believed it helped a new country achieve unity and cultural independence at a time when most people cared about political freedom.
语言学家认为，在大多数人关心政治自由的时候，它帮助一个新国家实现了统一和文化独立。
At a time when natural history was a valuable tool for discovery, Merian discovered facts about plants and insects that were not previously known.
在那时，自然史是很有价值的探索工具，梅里安发现了有关植物和昆虫的真相，这些真相从未为人所知。
The burger business faces more pressure from regulators at a time when it is already adapting strategies in response to shifts in the global economy.
在汉堡产业已经在调整战略以应对全球经济变化之际，它还面临着来自监管机构的更多压力。
Artist Michael Craig-Martin said: "Andria's brilliant project to bring artists from all fields into direct contact with children is particularly welcome at a time when the arts are being downgraded in schools."
艺术家迈克尔·克雷格-马丁说：“在这个艺术在学校里被降级的时代，安德里亚让来自各个领域的艺术家与儿童直接接触，这样出色的项目特别受欢迎。”
She brought her children into the world at a time when obstetrics was a primitive art.
她生孩子的时候，产科学还是一门原始医术。
At a time when many are pinching pennies, customers are noticing the new charges.
在人人都捂紧钱袋的这个时候，客户们都注意到新增费用。
Their share will grow-at a time when older diseases are still ravaging the poor.
这一比例还将上升——当穷人仍然受着老年疾病的困扰的时候。
Later on, you'll write code to enable the disabled tabs one at a time when they're needed.
在本文后面，我们还将编写代码来在需要的时候逐个启用和禁用这些选项卡。
This sentence, of course, comes at a time when US-North Korean relations are already tense.
当然，这次审判的时间正值美朝两国关系紧张之时。
It emerged at a time when Alibaba's broader business prospects have seemed to be dimming.
这种欺诈出现于阿里巴巴广阔的商业前景变得暗淡的时期。
At a time when most doors were closed to them, Shanghai demanded neither visa nor passport.
在多数大门都向犹太人关闭的时期，上海既不需要签证，也不需要护照。
At a time when its erstwhile titans could do with displaying contrition, signs of hubris abound.
在目前华尔街的昔日巨头们该显示忏悔的时候，傲慢的迹象却比比皆是。
At a time when sprawling shelves of ice are disintegrating, this berg seemed to signify more.
在一座座四面伸展开去的冰架正在分崩瓦解的年代里，这座冰山的出现更显得意味深长。
This is a bitter irony at a time when the development community is committed to poverty reduction.
在开发界致力于减少贫穷的时候，发生这样的事情是一种难堪的讽刺。
This is a bitter irony at a time when the development community is committed to poverty reduction.
在开发界致力于减少贫穷的时候，发生这样的事情是一种难堪的讽刺。
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