到20世纪60年代形势已发生了根本的变化。

By the 1960s the situation had changed fundamentally.

《牛津词典》

麻省理工学院全球变化科学中心的科学家 Stephanie Dutkiewicz 建立了一个气候模型，预测了整个世纪的海洋变化。

Stephanie Dutkiewicz, a scientist in MIT's Center for Global Change Science, built a climate model that projects changes to the oceans throughout the century.

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这种情况在17世纪早期发生了变化；在当时，园艺被认为是一个农业部门。

This changed in the early part of the seventeenth century when horticulture became accepted as an agricultural sector.

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This was in the early 1970s when many schools were going through remarkable changes.

那是在上世纪70年代早期,当时很多学校都在经历巨大的变化。

普林斯顿公开课 - 人性课程节选

One of the other things that happened during the twentieth century is that human life expectancy increased dramatically, people started living a lot longer.

在二十世纪发生的另一大变化是,人类的寿命预期显著增长了,人们活的更久了

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The classical hoplite formation then was not the long lived military institution of scholarly tradition, but merely one phase in a history of almost four centuries of slow change towards ever denser and more cohesive heavy infantry formations."

这种方阵的形成,并不是经过长期传承的传统军事制度,只是步兵阵型演变的一个阶段,战阵逐渐向更加紧密坚固的步兵阵型转化,而这个变化持续了约有四个世纪"

耶鲁公开课 - 古希腊历史简介课程节选