"102768433"^^ . "0"^^ . . . . . "the part of a network that connects other networks together; \"the backbone is the part of a communication network that carries the heaviest traffic\""@en-us . "102232576"@en-us . . . . "102672484"@en-us . "backbone"^^ . "02768433-n"^^ . . . . . . . . . . . "0"^^ . "backbone"@en-us . . .