This was a time when you had to keep calm.

这段时间你必须保持镇定。

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This was a time when the two countries were at war.

这是在两国交战时期。

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This was a time when speeches could last for four hours.

这时演讲可能持续了四个小时。

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In the past, this expression was used as an argument to re-elect a president, especially during a time when the country was at war.

VOA: special.2009.07.12

This was a time when Hopkins led all American universities in the importing of important European scholars, and it was a place of remarkable intellectual ferment.

当时霍普金斯先于美国的其他大学,邀请重要的欧洲学者来讲学，那里也是有影响的思想动乱的源地。

耶鲁公开课 - 文学理论导论课程节选

He was so much bigger than everybody else, so people really were not taken aback, because this was a time when physical imperfections were commonplace.

他虽然比普通人个子大很多,但人们并不会感到惊异,因为在那个时代有生理缺陷极为寻常

耶鲁公开课 - 欧洲文明课程节选

This was a time when women were just starting to get recognized in Corporate America.

FORBES: Inspiring Women Business Leaders - Christie Hefner

This was a time when post-modernist sculptors actually had a voice in national team selection.

ECONOMIST: Football

For Mr Vernon, by now a senior administrator in the State Department, this was a time when he began to develop his world view of economics.

ECONOMIST: Raymond Vernon