The filmmaker has spent the past few years working with his team of engineers to design and build the submarine called “Deep-sea Challenger”. Unlike ordinary submarines, it is wrapped in cameras and lights so that Cameron can film the ocean from the inside.

　　The minute-long video that Cameron took while under the sea has been released by the National Geographic. There are no words in the video, but there is something fascinating about this extremely quiet and remote place. Cameron said he was thankful that he of all people had had the chance to go there.

　　“There had to be a moment when I just stopped, and took it in, and said, ‘This is where I am; I’m at the bottom of the ocean, the deepest place on Earth. ’”Cameron told reporters.

　　The Mariana Trench was once thought to be of little interest to scientists. It was assumed that nothing could live under so much pressure and with so little light. But in recent years scientists have found that creatures there like fish and shrimps can resist the heavy pressure. They are also trying to figure out what role deep-sea trenches play in earthquakes.

　　Cameron told the BBC that he does not want this dive to be a one-time thing. He wants to use it as a platform for further ocean exploration. (370W)

　　1. What is the purpose of the passage?

　　A. To inform readers of Cameron’s adventure to the Mariana Trench.

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