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Sentence analysis
9Spans
Sentence
Span Details
レコード針
stylus; phonograph needlenoun
が
subject markergrammar
すり減っ
wear down; wear away; wear out; dwindle; be reduced; wear thin-> 磨り減るgodan verb
た
past tense or completed actiongrammar
ので、
because; sincegrammar
交換
exchange; swap; replacementnoun, suru verb
が
subject markergrammar
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
だ。
plain copulagrammar