短语词组短語mutable alleles 可變等位基因mutable gene 突變基因;易變基因mutable objects 可變對象;可變物件mutable string 字符串;可變字符串mutable variable 可變變量mutable e 可變的;易變的mutable copy 可變副本mutable references 可變引用mutable site 易變位點 返回 mutable