此外，肯尼迪在竞选时还谈到过另一个项目，就是航天计划。他认为，美国应该继续探索外层空间。

Another thing that Kennedy had talked about during the election campaign was the space program. He believed the United States should continue to explore outer space.

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她写了一篇关于探索外层空间的故事。

She wrote a story about space exploration.

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探索外层空间活动中所固有的危险使应用机器人而非人类去从事这类危险的工作变得较为可行。

The dangers inherent in outer space exploration make it much more feasible to use robots rather than humans for such dangerous work.

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