The result was that, even though the decision involved a number of untested changes, Edison agreed to hide the one inch diameter cable at least 2 feet below ground.

工结果，尽管含有一些未经测试的改动，爱迪生还是同意将直径一寸的电缆埋在地下至少两英尺处。

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This disc is hexagonal in shape and was suspended from a ballon by cable, which ballon was approximately twenty feet in diameter.

这个飞碟呈六角形状，通过绳索连接由球囊体悬挂，这个球囊体直径约20英寸（约6米）。

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But a single optical fiber with a diameter of less than half a millimeter can carry more information than a large cable made of copper wires.

但是只一根直径小于半毫米的光纤电缆就可以比由铜丝制成的粗电缆承载更多的信息。

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Like the copper cable, it would be buried in the ground--but a strand the diameter of a human hair could carry thousands of times more information than the copper wire.

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