加里卜与格拉芙制定了一项任务：仅利用风能，将一个水平放置的4.5米高石柱提至与地面垂直。

Gharib and Graff set themselves the task of raising a 4.5-meter stone column from horizontal to vertical, using no source of energy except the wind.

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从后来的任务中得到的数据显示，在两极地下不到一米的地方有浓度相当高的氢，由此推断是水。

Data from a later mission indicates significant concentrations of hydrogen and by inference water less than a meter underground at both poles.

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事实上，参与者在执行充满挑战的任务中消耗的热量比未参与者高29.4%。

In fact, participants who took on the challenging intellectual tasks consumed up to 29.4 percent more calories than those who did not.

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It turns out that the group that had--were paid a dollar rated the task as much more fun than the group given twenty dollars.

结果发现，拿一美元的那组对这个任务的评价,要比拿20美元的那组高得多。

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