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ThefirsttelegraphcablewaslaidundertheseabetweenEnglanda...
问题详情:ThefirsttelegraphcablewaslaidundertheseabetweenEnglandandFranceinesaremuch 1andheavierthantelegrapheareanumberofreasonsforthis:onereasonisthatthesaltwateroftheseaharms 2 telegraphwires,ands...