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。

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"Today is a day when we as a nation, along with our many friends around the world, mark with a heavy heart and great sadness this moment of unbearable loss for the many families involved," he said.

“今天是一天当我们作为一个国家，和世界各地的朋友一起，带着沉重的心情和巨大的悲痛来铭记这个给许多牵连其中的家庭带来无法承受之损失的时刻，”他说。

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The world owes a great deal to those who design and programme computers, many of whom show autistic traits.

我们全世界的人都应当感谢那些设计计算机和编写程序的人们，他们中间的很多人都表现出孤独症的性格。

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D'Amelio's appointment is a promising step, but the world's biggest drug maker still faces a great many challenges and has some big jobs to fill.

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Second, the problem that the BWS was attempting to address was a lack of US dollars outside of the US. Following WW II, with the economies of the rest of the world in shambles, a great many countries needed to trade with the US. How could foreign countries trade with the US if they did not have dollars?

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The problem that the Bretton Woods System was attempting to address was a lack of US dollars outside of the US. Following WW II, with the economies of the rest of the world in shambles, a great many countries needed to trade with the US. How could foreign countries trade with the US if they did not have dollars?

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