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1·Here you can explore the universe and the unknown mystery behind it!

你可以在这里探索宇宙和它背后未知的奥秘！

2·This is the unknown face of the moon that is always looking away from us, so we never see it from down here on the earth.

月球未知的一面总是远离我们，所以我们从地球上永远看不到它。

3·Silently, he let himself go into the unknown.

他默默地走进未知的世界。

4·I remember the fear and the panic of the unknown.

我记得那种对未知的恐慌感。

5·It urges us to explore the unknown domain of the universe.

它促使我们去探索宇宙的未知领域。

6·In Juan's world, the unknown and undiscovered was vast and marvelous.

在 Juan 的世界里，未知和未被发现的东西是广阔而不可思议的。

7·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。

8·For centuries, explorers have risked their lives venturing into the unknown for reasons that were to varying degrees economic and nationalistic.

几个世纪以来，探险家们冒着生命危险探索未知的世界，其原因在不同程度上与经济和民族主义有关。

9·The key may be tackling something new; the challenge of the unknown is likely more beneficial than putting together the same jigsaw puzzle over and over again.

关键可能在于处理一些新问题； 挑战未知的事物很可能比一遍又一遍地做相同的拼图游戏更为有益。

10·They could sail out for days into the unknown and assess the area, secure in the knowledge that if they didn't find anything, they could turn about and catch a swift ride back on the trade winds.

他们可以在未知的海域航行数天，并对该地区进行评估。他们知道如果没有发现任何东西的话，他们可以掉头，并借着信风迅速返回。