He pored through historical sources to unearth past trends in income inequality.

他通过仔细研究历史资料，揭示出过去收入不平等的趋势。

" According to reliable historical sources, the sword may present itself to any worthy Gryffindor, " said Scrimgeour.

“根据可靠的历史记载，这把剑每当遇到格莱芬多的杰出学生时就会自动现身，”斯克林杰说。

They say that in the 1970s, researchers looked for historical sources supporting a different understanding of the Second Amendment.

他们说在20世纪70年代，研究人员寻找支持对于第二修正案不同理解的历史来源。

On the other hand, suggestions that Nightingale took credit for Seacole's innovations don't seem to have much ground in historical sources.

另一方面，南丁格尔将西克尔的创新归功于她的说法似乎没有太多历史依据。

Historical sources tell us that the women did not cover their head when they were in the confines of their homes without any strangers.

历史资料告诉我们，这些妇女在没有任何陌生人的情况下在家中时并没有遮住头。

They used survey maps and historical sources such as woodblock prints, texts and paintings from the 18th and 19th centuries to show how the park changed over time.

他们使用了测量图和历史资料，如18世纪和19世纪的木刻版画、文字和绘画，以展示公园随着时间如何变化。

Better still, the quality of her drawings was so consistent, researchers used them as a baseline to reconstruct the past 400 years of sunspot activity from various historical sources.

更棒的是，她绘图的质量始终如一得高，因此研究人员们将其绘图作为基准线，通过众多历史资料，重构了过去 400 年的太阳黑子活动。

Although we have very good information about the members of the aristocracy, those who don't belong to it, in these original historical sources, they're usually referred just as commoners.

尽管我们对贵族成员有很好的了解，但在这些原始历史资料中，那些不属于贵族的人通常被称为平民。

In other words, when, for instance, information is collated about early illnesses, methods of upbringing, schooling, etc., we must also take into account information from other historical sources about how common or exceptional these were at the time.

换句话说，例如，当整理有关早期疾病、抚养方法、学校教育等的信息时，我们还必须考虑来自其他历史来源的有关这些疾病在当时的普遍性或特殊性的信息。