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.
Voytek说，我们不得不这么做，因为我们必须作出某种决定。
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。
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。
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