The chief source of all this passion is that thought for what is absent and future, which, with man, exercises such a powerful influence upon all he does.

这种激情的主要来源是对所缺少的和未来的思考，这种思考和人一起，对他所做的一切产生了如此强有力的影响。

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Water was the main source of mechanical power, and by the end of the seventeenth century, England alone is thought to have had some 20,000 working mills.

水是机械动力的主要来源，而到了17世纪末，人们认为仅英格兰就有2万个左右的工作磨坊。

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The Gnostics “believed that there is an ultimate source of goodness, which they thought of as the divine mind, outside the physical universe.

诺斯替主义者相信“善有一种终极的源头，他们认为是一种神圣的思想，它处在物质世界之外。

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The leak is thought to have been the source of high levels of radiation found in seawater nearby.

BBC: Japan quake: Nitrogen pumped into nuclear reactor

He is accused of being a former founding member of the Norte del Valle drug cartel and is thought to be the supply source for multi-ton loads of cocaine smuggled into the United States.

CNN: Venezuela arrests alleged Colombian drug kingpin

In addition, it cast doubt on a business strategy that seems to be at variance with the experience of every established launch provider in the aerospace sector including the Chinese, who were thought to be the lowest-cost source of launch services in the global market.

FORBES: The Case Against SpaceX, Part II