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second in rank; second sign of the Chinese calendar
「乙」 has another reading with different meanings.
彼女は試験で乙の成績を取って満足していた。
She was satisfied with getting a B grade on the exam.
この製品は品質検査で乙と判定されました。
This product was rated B in the quality inspection.
契約書には甲と乙の両者の署名が必要になる。
The contract requires signatures from both Party A and Party B.