Yet the twilight zone is virtually unexplored.

，过渡带几乎未被探索过。

Huge parts of the world are still unexplored.

世界的很大部分地区还没有考察过。”

In fact, we live on a mostly unexplored planet.

事实上，我们就生活在一个很多地方皆未被研究的星球上。

Sleep is something that has really been an unexplored topic cross-culturally.

睡眠这个话题还没有以跨文化的方式被研究过。

And it's largely an unexplored frontier.

且那里基本上是一个未开发的领域。

Heidi Kunz organization first pulls unexplored mines from the earth.

海蒂·兹组织是次从土地中勘探隐藏的地雷。

The vast majority of our deep seas remain unexplored, and unknown.

我们深海的绝大部分仍未被探索，未知。

The truth is that these invisible molecular worlds are vast and largely unexplored.

事实是，这些看不见的分子世界幅员辽阔，大部分还未经勘探。

It takes hours of diving to hit bottom, and it's largely an unexplored frontier.

要潜到水底需要几个小时，且那里基本上是一个未开发的领域。

India's moon craft would have become the first to land at the moon's unexplored south pole.

印度月球探测器原本可以个登陆无人涉足的月球南极的探测器。

Only a couple dozen have reached the seven mile depth of the Challenger Deep, so it's largely unexplored.

但只有几十个达到了7英里深的“挑战者深渊”，所以它在很大程度上还没有被探索过。

But they ended up focusing on how baby chimps behave, so their extensive recordings have remained largely unexplored.

但结果把重点放在观察幼年黑猩猩上了。这样一来，尽管他们录下了大量音频，但其中大部分是没被研究过的。

Leave no shell unturned, no coral unexplored.

不留下（任何）一个贝壳没被翻开， （不留下）一丛珊瑚，没被探索的。

A vast, unexplored wilderness shrouded in mystery.

是一个庞大的笼罩在谜团中的处女地。

Uh no, I think some things are better left unexplored.

噢.不, 我认 有些事还是不弄清楚的好.

Why do we study sleep? Sleep is something that has really been an unexplored topic cross-culturally.

我们何要研究睡眠？睡眠这个话题还没有以跨文化的方式研究过。

He added, " … over 90 percent of that living space is in the ocean and most of that ocean is unexplored" .

他补充说，" … … 超过90%的生存空间在海洋中，大部分的海洋尚未开发。"

If we could understand how sea lions move, we could design vehicles that could one day stealthy explore shipwrecks, underwater mines or unexplored caves.

如果能够知道海狮怎样移动，就可以设计出将来能够秘密搜寻遇难船只，海底矿藏或未勘测的洞穴的车辆。

Experts believe it will likely take many years before the technology and equipment are developed to send humans to this unexplored area of space.

专家们认，将人类送到这个尚未探索的太空区域所需的技术和设备，可能需要很多年的时间才能研发出来。

It takes a feat of engineering just to get there. It takes hours of diving to hit bottom and it's largely an unexplored frontier.

要想到达那里，需要一项卓越的工程技术。到达海底需要潜水数小时，且这基本上是一个未被探索的前沿。