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1.The black cable runs through the tunnel, connecting two buildings.
这条黑色电缆穿过隧道，连接着两座建筑。
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2. The technician carefully unwrapped the black cable and began to connect it to the computer.
技术人员小心翼翼地解开了黑色电缆，并将其连接到电脑上。
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3.The black cable was a mystery until the engineers discovered its purpose.
直到工程师们发现它的目的之前，这条黑色电缆一直是一个谜。