Two world wars and a Great Depression rocked the confidence of many people that scientific expertise alone could create a prosperous and ordered world.

两次世界大战和一次经济大萧条动摇了许多人的信心——他们原本以为，单凭科学知识就可以创造一个繁荣有序的世界。

youdao

For even as we celebrate tonight, we know the challenges that tomorrow will bring are the greatest of our lifetime - two wars, a planet in peril, the worst financial crisis in a century.

即便我们今晚在此庆祝，我们也知道明天的挑战是前所未有的——两场战争、一个奄奄一息的星球、和一场百年不遇的经济危机。

youdao

I considered some of the awful things my grandparents and great-grandparents had seen in their lifetimes: two world wars, killer flu, segregation, a nuclear bomb.

我想到了祖父母和曾祖父母在世时遇到的可怕事情：两次世界大战、致命流感、种族隔离、核弹。

youdao

"At a time when we're fighting two wars and facing a serious deficit, this would have been an inexcusable waste of money.

VOA: standard.2009.07.21

The two countries have fought several wars since independence. The latest arrests come as a trial continues for the lone surviving suspect in last November's terror attacks on India's commercial capital,Mumbai.

VOA: standard.2009.08.07

(Choral music) The two European leaders listened to a French army choir sang the Marseillaise and then the German anthem, marking a French-German friendship that grew from the ashes of the two world wars.

VOA: standard.2009.11.11

But none of this necessarily means that thinking has changed enough to keep talks going once started, let alone to produce a settlement to a dispute that has brought about two wars and a 12-year insurgency involving some 35, 000 deaths.

ECONOMIST: Cooling it in Kashmir

We paid for two wars with a credit card -- debt that you're going to have to pay off.

WHITEHOUSE: President Obama Speaks on College Affordability

We fought two wars on a credit card, adding enormously to our debt.

WHITEHOUSE: The White House