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JLPT
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strokes
#17865
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
彼らは油田を経営していた。
They operated an oil well.
彼は新しい油田に全財産を賭けた。
He risked his whole fortune to discover new oil fields.
この油田はかつては現在の何十倍もの石油を産出したものだ。
This oil field used to produce an order of magnitude more oil as it does now.