Silt turbidite (landslide) layers on the deep sea floor far off the coast from underwater landslides, likely caused by strong seismic shaking.

离海底滑坡不远的深海底床的淤泥浊积(滑坡)层很有可能是由强烈的地震晃动造成的。

youdao

It is here where you can find dense groupings of animals that derive their energy from sources other than the sun around volcanic vents on the deep sea floor.

在这儿，你能发现密集的动物群，它们所摄取的能量不是来自深海底部的火山口周围的阳光。

youdao

The elemental geochemical anomaly of pore water in Marine sediments during the formation of gas hydrate is a significant indication for Marine gas hydrates in the deep sea floor.

海洋天然气水合物在生成过程中会引起周围沉积物孔隙水中元素地球化学异常，这些异常是指示天然气水合物存在的重要标志。

youdao

He says the sea floor is, on average, 4,000 meters deep.

VOA: special.2009.01.13

The pressures are too great, and no engineering or materials conceivable today would allow us to build livable-sized spaces on the deep sea floor.

FORBES: Why Don't We Spend More On Exploring The Oceans, Rather Than On Space Exploration?

They are also trying to understand the role that deep seas trenches play in earthquakes - these cracks in the sea floor are formed at the boundary of two tectonic plates and some believe the push and pull taking place deep underwater could be the cause of major earthquakes, such as the 2011 quake that resulted in such devastation in Japan.

BBC: James Cameron back on surface after deepest ocean dive

On Earth, sea-floor spreading is fuelled by molten rock upwelling from deep inside the Earth.

BBC: Enceladus has 'spreading surface'