There are five kingdoms: animals, plants, fungi, chromists—including one-celled plants such as diatoms—and protozoa, or one-celled organisms.

归有五个界：动物界、植物界、真菌界、茸鞭生物界——包括单细胞植物，如硅藻——和原生动物界，或单细胞生物体。

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By showing algae's essential role in the evolution of photosynthesis, it also explores the innumerable species of plants which all have their origins in this one-celled life form.

从展示有关藻类生物的在光学作用进化过程中的必要角色，本纪录片同时显示所有庞大植物品种皆是源自这个单细胞形式生物。

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Ultraviolet radiation may also damage marine life by killing one- celled plants called phytoplankton, which form the base of the ocean's food chain.

紫外线辐射还可以通过杀死单细胞的浮游植物来破坏海洋生命，这种浮游植物是构成海洋食物链的基础。

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Here is just one example: Single-celled marine plants produce fully half of all the oxygen in our atmosphere.

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