这个小小的球状体的身体外壳上有着上千条细小的发丝，叫做纤毛，推进它以闪电般的速度穿行于淡水泡沫中。
This little spheroid sports thousands of tiny hairs around the outer edge of its body called cilia that propel it at lightning speeds through freshwater scum.
这个小小的球状体的身体外壳上有着上千条细小的发丝，叫做纤毛，推进它以闪电般的速度穿行于淡水泡沫中。
This little spheroid sports thousands of tiny hairs around the outer edge of its body called cilia that propel it at lightning speeds through freshwater scum.
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