Russian experts now believe the safest way to avoid icebergs is to copy the Norwegians and operate sub-sea, laying pipelines in deep trenches.

俄国专家现在相信最安全避免冰山的方法是仿效挪威人的作法，在海底作业，在深邃的壕沟里铺设管道。

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Most deep ocean basins range in depth from about 4 to 6 kilometers, with some narrow trenches near Pacific ocean basin margins dropping to as low as 11 km below sea level.

大多数海盆在深度上从4公里到6公里左右，在太平洋附近海盆边缘有些狭窄海沟可以陡降到海平面以下11公里处。

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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.

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