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Sentence analysis
5Spans
Sentence
Span Details
努力
effort; hard work; endeavornoun, suru verb
こそ
it is ... that ...; precisely; definitely; although; while; it is the case that ... but; precisely because; only because; not at all; absolutely not; neverparticle
苦蘇こそkousso; African redwood
が
subject markergrammar
成功の鍵
key to success; key success factorexpression, noun
だ。
plain copulagrammar