John F. Kennedy once observed that "Our problems are man-made, therefore they may be solved by man."

约翰f .肯尼迪曾经说过：“我们的很多问题是人为的，因而人类能解决这些问题。”

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As Eric Hoffer, an American social philosopher, once observed: "the search for happiness is one of the chief sources of unhappiness."

正如美国哲人，Eric Hoffer曾经说过的那样：“追求快乐是不快乐的主要原因。”

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Philosopher and historian Will Durant once observed that the only thing that could get countries to join forces would be an alien invasion.

哲学家和历史学家Will Durant曾经评论到，能让国家联合起来的唯一办法是外星人入侵。

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The record business, someone once observed, was invented to make the movie industry look good.

FORBES: Music Mogul Meltdown

Ronald Reagan once observed that the best education on Capitol Hill is the white heat of public opinion.

FORBES: But Doesn't Obama Share His 'Generals'' Ideology?

Ronald Reagan once observed that the definition of immortality is a federal agency or program that has outlived its usefulness.

FORBES: Fact and Comment