Flagella is an unique structure that presents in appropriate half of bacillus,few coccus,and all of spirilla and vibrio.
鞭毛
的一种特殊结构,约半数的杆、极少数球和所有的螺旋及弧都有鞭毛。
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Additionally, the cell wall helps maintain their shape: the round-shaped bacteria are called cocci, the rod-shaped ones are called bacilli, spiral-shaped ones are spirilla, and sometimes the same bacteria can have multiple forms in which case they're called pleomorphic.
此外，
有助于保持其形状：圆形的称为球，棒状的叫
，螺旋形的是螺旋，有些具有不同的形态，因此它们被称为多形。
