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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Located in the Mariana Islands, north of Australia and east of Japan along the equator, Guam is situated next to the Marianas Trench, the deepest part of any ocean in the world.

关岛位于澳大利亚以北，日本以东，是赤道附近太平洋海域上马里亚纳群岛南部的一个岛屿，毗邻世界最深的马里·亚纳海沟。

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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