Question

这些细电线和埋在街道下方的电缆相连。（bury）

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Answer

Those thin wires are connected to the cables buried under the street.

【解析】

根据句意可知时态为一般现在时。be connected to和……相连；buried under埋在……下方，因为电缆是被埋在街道下面，故用buried表被动；故答案为Those thin wires are connected to the cables buried under the street.