HSK 7-9
掉队
diàoduì动
to fall behind; to drop out
长跑时他体力不足掉队了。
Cháng pǎo shí tā tǐ lì bù zú diào duì le.
He fell behind during the long run because he lacked stamina.
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Appears across levels (7-9) in the HSK 3.0 word list.