The space station is a useful instrument in exploring outer space.
空间站是探索太空的有用工具。
What could be a bigger goal than making it to the moon, exploring outer space?
还有比登月更大的目标吗？去探索外太空？
Exploring the outer space is a real challenge to mankind.
探索外层太空对人类是真正的挑战。
Is Outer Space Worth Exploring?
太空是否值得探索？
Is Outer Space Worth Exploring?
太空是否值得探索？
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