突变可以是由辐射、化学作用、外部病原体(如：病毒)或细胞分裂时基因组复制错误造成。

Mutations can be induced by radiation, chemical treatment, foreign pathogens (e.g. viruses), or due to errors that occur during replication of the genome each time a cell divides.

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突变可以是由辐射、化学作用、外部病原体(如：病毒)或细胞分裂时基因组复制错误造成。

Mutations can be induced by radiation, chemical treatment, foreign pathogens (e.g. viruses), or due to errors that occur during replication of the genome each time a cell divides.

youdao