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Sentence
Span Details
無段階
stepless; continuous; infinitely variableno-adjective
変速機
transmission; gearboxnoun
は、
topic markergrammar
エンジン
enginenoun
回転数
number of revolutions; rotational speednoun
を
object markergrammar
最適
optimal; best; most suitablena-adjective, noun
に
adverbial form after a na-adjectivegrammar
保ち
keep; maintain; preserve; last; be durable-> 保つgodan verb
ます。
polite non-pastgrammar