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JLPT
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strokes
#152442
frequency
Not started
Mastered counts as known everywhere (frontier, map, extension) but never appears in the quiz again. New wipes the review history for this item.
例文 · examples
一酸化炭素とは炭素化合物の不完全燃焼で発生する有害物質です。
Carbon monoxide is a poisonous substance formed by the incomplete combustion of carbon compounds.