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Peter Snow presents highlights from today's three deep-sea dives around the world. In 2002 BBC organized three concurrent dives , first in Monterey Bay where unmanned submersible is lowered into underwater canyon which is over mile deep. Se...

一架遥控推进器加上两艘载人潜水艇潜入海中的幽冥世界里，他们不但遇上六鳃鲛，还碰到了双髻鲨，甚至还发现一艘沉船，而它的位置深到无法被打捞起来。这一场海底深渊的探险...