但是，自二十世纪五十年代以来一些技术的发展为这些学科的研究提供了更健全、更客观的基础。

A number of techniques developed since the 1950s, however, have placed the study of these subjects on a sounder and more objective footing.

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新屏幕格式的引入被推迟了四分之一个世纪，而颜色尽管在接下来的二十年里被用于特制产品，它也是直到二十世纪五十年代才成为一种常态。

The introduction of new screen formats was put off for a quarter century, and color, though utilized over the next two decades for special productions, also did not become a norm until the 1950s.

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上世纪五十年代末，在香港的某个地方，一位年轻的女服务员发现自己怀上了一位厨师的孩子，这位厨师很可能是她餐厅里的一位同事。

Somewhere in Hong Kong, in the late fifties, a young waitress found herself pregnant by a cook, probably a co­worker at her restaurant.

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He urged revival of the slave-trade in the late 1850s, and he developed a theory of what he called warranteeism--w-a-r-r-a-n-t-e-e-I-s-m.

他促成了十八世纪五十年代后期,奴隶交易的复苏,还自己发明了一套理论,名为抵押品主义

耶鲁公开课 - 美国内战与重建课程节选

They were the same size in the 1850s, but Brive gets the railroad and not Tulle, the railroad from Paris.

它们在十九世纪五十年代还是一样大的,但是布瑞福修了铁路,而不是图勒,通往巴黎的铁路

耶鲁公开课 - 1871年后的法国课程节选

Because it was in the 1950's or so, maybe the late 1940's, that people started to discover lithium, even though it had no natural function, it did do something in our bodies.

因为在二十世纪五十年代左右，可能是四十年代末期，人们开始发现锂，尽管不参与人体的正常生理活动，但是它确实会对我们的身体产生影响。

麻省理工公开课 - 化学原理课程节选