这份基于NASA资助的由NRC提交的报告，建议未来登陆火星的所有飞船都必须经过100灭菌的过程。

The advisory, which is based on a NASA-funded report by the NRC, recommends that all future landers be 100 percent sterilized.

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美国东海岸沿线居住的数百万人正在准备迎接飓风艾琳的到来，预期飓风将于未来24小时内登陆。

Millions of people living along the east coast of the United States are preparing for the arrival of Hurricane Irene, which is due to reach land in the next 24 hours.

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在未来的几十年当中，无人驾驶的宇宙飞船将登陆月球，并以“就地取材”的方式对月球资源的开发利用进行试验(ISRU)。

Within the coming decades, unmanned spacecraft will land on the Moon and begin experiments with in-situ resource utilization (ISRU).

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