有些浮游植物是细菌，有些是原生生物，而大多数则是单细胞植物。
Some phytoplankton are bacteria, some are protists, and most are single-celled plants.
藻是几千种不同有生物的总称，包括单细胞植物，也包括大型褐藻和其他大型植物。
Algae is a name for thousands of different organisms. They include single-celled plants as well as kelp and other large plants.
上图就是旧金山海湾的一个浮游生物网内聚集的单细胞植物硅藻——这种藻类在世界各大海洋都广泛分布。
The single-celled diatoms below—the likes of which are found in oceans worldwide—were collected with a plankton net in San Francisco Bay.
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