After years of observing human nature, I have decided that two qualities make the difference between men of great achievement and men of average performance—curiosity and discontent.

经过多年对人性的观察，我认为有两种品质决定了伟人和普通人之间的区别——好奇心和不满足。

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Knowing how to display these two qualities takes practice.

知道怎样运用这两中品质需要练习。

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Biking is both fun and convenient, two qualities that do not always go together.

骑自行车既有趣又便捷，这两种品质并非总是同时兼备。

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She says these two qualities also define vampires in movies and literature.

VOA: special.2010.01.20

But there are two qualities which happen to be equal.

这里有两个质量恰好是相等的

耶鲁公开课 - 基础物理课程节选

Arbitrary and differential are two correlative qualities.

任意性和差异性是两个相关的属性。

耶鲁公开课 - 文学理论导论课程节选

As normal men, nothing is more attractive than those two qualities in a woman.

FORBES: Readers Say

Pioneers had two qualities: one, they had to be adventurers, but they were also community builders.

NEWYORKER: Get Rich U.

These two qualities are essential, I believe, for anyone who would sit on our nation's highest court.

CNN: Transcript of Obama-Sotomayor announcement