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Sentence

光ひかりファイバー技ぎ術じゅつは通つう信しんを変かえた。

Span Details

光ひかりファイバー

技ぎ術じゅつ

technology; engineering

は

topic marker

grammar

通つう信しん

transmission; signal; telecommunications

noun, suru verb

change; alter; transform

-> 変えるichidan verb

past tense or completed action