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短语

submerged object

强调
潜艇 подводный объект (Off Gorleston, Norfolk, a dredger struck a submerged solid object 30 miles offshore, but when it went back using echo sounders, no object could be found; May 1975 (Janet & Colin Bord, "Unexplained Mysteries of The 20th Century") ART Vancouver)
submerged object recovery
: 1 短语, 1 学科
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