To help solve this mystery, scientists went on an ocean expedition to drill into a large, 145-million-year-old underwater supervolcano.

为了解开这个谜，科学家们进行了一次海洋探险，去钻探145亿年前就在水下存在的超级火山。

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In the drill, the swimmer was working on her underwater dolphins.

在这次演习的游泳者正在她的水下海豚。

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The key point in making underwater concrete of drill hole grouting pile is that it requires high fluidity.

钻孔灌注桩水下混凝土配制的关键是要求流动性要好。

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The fact that oil companies now have to go a mile underwater and then drill another three miles below that in order to hit oil tells us something about the direction of the oil industry.

WHITEHOUSE: Deepwater BP Oil Spill: Presidential Press Conference

The burn-off is part of the effort to prevent the spread of oil from an underwater well that was broken open when the drill rig Deepwater Horizon blew up and sank last week.

CNN: Oil spill from rig explosion at 5,000 barrels a day

Companies can now drill 10, 000 feet to 11, 000 feet underwater with remarkable safety, compared with far riskier drilling at several hundred feet four decades ago.

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