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.