They have a whiplike structure called a flagellum.

它们有像鞭子一样鞭毛结构。

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BIOLOGY: Certain bacteria propel themselves using a flagellum, a whiplike tail.

生物学：有些细菌会以鞭毛(像鞭子一样的尾巴)驱动自己前进。

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Certain eukaryotic cells can swim freely in liquid environments, propelled by whiplike cilia or flagella.

某些原核细胞能够在液体环境中自由游动，由鞭子似的纤毛和鞭毛推进。

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Whiplike cords of mint raced across the flagstones.

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