乙肝病毒基本变异也是免疫失败的一个原因。
The basic variant of hepatitis B virus is one of the reasons for immunization failure.
因此，细胞关联性是DNA的一个基本部分，和细胞的字母一样受到变异的影响。
Cell affinity, therefore, is an essential part of the DNA and is subject to mutation as much as the letter of the cell is.
GP的基本遗传算子包括选择、交叉和变异。
The basic genetic operators of GP are mutation, crossover, and selection.
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