Usage note
乙是天干的第二位,常用来表示顺序中的第二,比如乙等或乙方。
Yǐ shì tiāngān de dì èr wèi, cháng yòng lái biǎoshì shùnxù zhōng de dì èr, bǐrú yǐ děng huò yǐ fāng.
Second (B) is the second of the Heavenly Stems, often used to indicate the second in order, like grade B or party B.