植物与动物都供给这些天然材料。

Both plants and animals supply these natural materials.

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曾经，在植物与动物的进化之前，细菌就是这个星球上生命的全部。

Once, before the evolution of plants and animals, bacteria were all there was.

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这些人造的基因单位通过连接病毒、细菌、植物与动物的基因片段创造。

The artificial gene units are created by joining fragments of DNA from viruses, bacteria, plants and animals.

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