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来源：雅诚德英语网
Had a few, fateful mutations changed an innocuous chimp virus into a human killer?
是一些决定性的突变让这种良性的猩猩病毒变身为人类杀手的吗？
Had a few, fateful mutations changed an innocuous chimp virus into a human killer?
是一些决定性的突变让这种良性的猩猩病毒变身为人类杀手的吗？