Voytek says we have to because we have to make decisions somehow.
Voytek说，我们不得不这么做，因为我们必须作出某种决定。
Mary Voytek, director, Astrobiology Program, NASA Headquarters, Washington.
MaryVoytek，天体生物计划负责人，NASA总部，华盛顿。
Voytek says we have to Because we have to make decisions somehow. What do other people think about this?
佛伊泰克认为我们别无选择，因为不管怎样我们必须做出决定。
And I put this to Voytek, what dollar figure should be put on human life to decide whether to ban the use of cell phones?
把生命的价值考虑进去，要多大的数字才足以决定要禁止使用手机？
Professor: All right, so Voytek says, and here, he disagrees with Julie. Julie says we can't put a number on human life for the purpose of a cost-benefit analysis.
教授：好的，Voytek不同意Julie的想法，Julie说，我们不能用数值来衡量生命，来做一个成本效益分析。
"The more we find in our asteroid belt objects that do have water, the more convinced we are that that was a possible process to rehydrate the earth," said NASA astrobiologist Mary Voytek.
“我们在我们的小行星带发现确实有水的物体越多，就越能说服我们那是一个让地球再水化的过程，”美国航空航天局的天体生物学者玛丽沃伊泰克说。
"The more we find in our asteroid belt objects that do have water, the more convinced we are that that was a possible process to rehydrate the earth," said NASA astrobiologist Mary Voytek.
“我们在我们的小行星带发现确实有水的物体越多，就越能说服我们那是一个让地球再水化的过程，”美国航空航天局的天体生物学者玛丽沃伊泰克说。
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