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Sentence
Span Details
光学機械
optical instrumentnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
精度
precision; accuracynoun
は
topic markergrammar
年々
year by year; annually; every yearnoun, adverb
向上
improvement; advancement; rise; elevation; progressnoun, suru verb
し
light/support verb with a noun or noun-like phrase-> するgrammar
ている。
ongoing or resultant stategrammar