原核细胞的鞭状延长部分，基部有基体，当鞭毛进行挥鞭式运动时可以促使细胞移动。
Flagellum (pl. flagella) A whiplike extension of prokaryote cells, with a basal body at its base, whose beat causes locomotion of the cell.
挥鞭样损伤是巨大的外力使颈部运动超出正常活动范围时脊柱颈段受伤。
Whiplash is an injury to the cervical region of the spine when a great force causes the neck to go beyond its normal range of motion.
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