optical fibre
noun [ C ] UK (US optical fiber) uk/ˌɒp.tɪ.kəl ˈfaɪ.bər/ us/ˌɑːp.tɪ.kəl ˈfaɪ.bɚ/
光学纤维，光纤
a long, thin glass rod through which very large amounts of information can be sent in the form of light
See also: fibre optics
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