In any new work I aim to transport myself into the as yet unknown space before me and possess it as my own.

我在任何新项目里都试图让自己置身于当时处于未知的空间里并将其视为己有。

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It's this sense of the unknown that makes the far side of the moon such an interesting place for scientific and space research.

正是这种对未知的感觉，使得月球的远侧成为科学和太空研究的一个有趣的地方。

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The soundness of the business case is unknown to outsiders. Mr. Bigelow declines to say if he has firm commitments from any countries or companies to rent space on his space stations.

对局外人来说，这种商业模式是否可靠还是未知之数，在被问及是否已经向其他国家或公司作出要出租太空站空间的承诺时，毕格罗也拒绝提供答案。

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Ed White would leave the protection of the spacecraft and move out into the unknown emptiness of space.

VOA: special.2009.06.24

And just as some early explorers made the ultimate sacrifice while searching for unknown lands, space pioneers may also pay a steep price for bravely going where no human has gone before.

CNN: Mars on the brain? Red Planet pioneers to face cosmic mind trip

Predicting the location of the termination shock was hard, the researchers say, because the precise conditions in interstellar space are unknown.

BBC: Voyager impression (Nasa)

What that might be is unknown, but experiments in space have shown that cosmic rays can have some positive impacts on biological materials.

BBC: Earth News - Cosmic pattern to UK tree growth