The Mariana Trench is the deepest spot in the world's oceans.

马里·亚纳海沟是世界海洋中最深的地方。

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It's no exaggeration: four-fifths of the Earth remains largely unexplored and the Mariana Trench is the planet's deepest mystery.

毫不夸张地说：地球的五分之四还没有被探测，而马里·亚纳海沟就是这其中最具神秘的地方。

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Cameron will dive to the same place Piccard and Walsh did, known as Challenger Deep, located at the southern end of the Mariana Trench.

卡梅隆将潜到皮卡德和沃尔什曾经到过的同一个地方，也就是众所周知的挑战深度，即马里来那海沟以南。

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On Jan.23,1960, the two men took the Trieste to the deepest point in the Pacific Ocean's Mariana Trench, a ravine called Challenger Deep.

VOA: standard.2010.06.21

But the explorer said he was surprised there were so little visible signs of life in the Mariana Trench.

BBC: Science & Environment

While places like the Mariana Trench were once thought to be of little interest, there has been a recent resurgence of scientific interest in the deep.

BBC: James Cameron back on surface after deepest ocean dive

It's up for grabs, who will be first to descend to the bottom of the legendary Mariana Trench and back, in roughly the time it takes to drive from San Francisco to Los Angeles.

WSJ: A New Wave of Ocean Explorers | Marvels