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“下潛”的拼音為：xià qián...

潛水員下潛到超過危險(xiǎn)線的深水中去了.The diver went into the deep water beyond the danger limit.為了下潛,里邊還有個(gè)密封小水槽―負(fù)槽.For diving there's small sealed tank inside, the negative tank.潛水艇的下潛速度非常快.Submarine can submerge very quickly....

“下潛”的英語可以翻譯為：dive，submergence ...