Outside of the nucleus are two centrosomes, each containing a pair of centrioles.

细胞核外有两个中心体，每个中心体包含一对中心粒。

Chlamydomonas is a single-celled alga that uses its centrioles for both swimming and reproduction, so can't do both at the same time.

衣藻是一种单细胞藻类，利用其中心粒进行游泳和繁殖，因此不能同时进行。

Its multicellular relative, Volvox, however, can do both at once because its cells have specialized -with some using the centriole for swimming and others using it for reproduction.

然而，它的多细胞近亲 Volvox 可以同时完成这两项工作，因为它的细胞具有特化性——一些使用中心粒进行游泳，而另一些使用中心粒进行繁殖。