硅藻土是由蜂窝状的细胞壁形成的。

Suberinite is formed from suberized cell walls.

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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。

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

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再想想，这种单细胞的硅藻(网状硅藻属的硅藻)，是一种类型的海藻，放大了40倍后，显示了像“彩虹”那样的错综复杂五彩缤纷排列。

Think again. This unicellular diatom (diatom Arachnoidiscus), a type of algae, reveals an intricate rainbow pattern under 40x magnification.

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