in AM, use 美国英语用 optical fiber
N-VAR 光导纤维；光纤 An optical fibre is a very thin thread of glass inside a protective coating. Optical fibres are used to carry information in the form of light. 光导纤维；光纤
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Nearly every long-distance call made in Britain now travels on optical fibre instead of cable.
现在在英国，几乎所有长途电话都通过光纤而非电缆传输。
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...an optical fibre network to which every home and office can be connected.
可连接所有家庭与办公室的光纤网络
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