HSK 7-9
行列
hángliè名
formation; array; (fig.) ranks (as in "join the ranks of ...")
她毕业后加入教师行列。
Tā bì yè hòu jiā rù jiào shī háng liè.
She joined the ranks of teachers after graduating.
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Appears across levels (7-9) in the HSK 3.0 word list.