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second (in a series)
二ふたつ目めの課題かだいに取り組んとりくんだ。
I worked on the second task.
二ふたつ目めの駅えきで降りおりてください。
Please get off at the second station.
彼かれが挙げあげた二ふたつ目めの理由りゆうには説得せっとく力りょくがあった。
The second reason he gave was persuasive.