单词：spontaneous mutation
spontaneous mutation的用法和样例：
例句
- Spontaneous and induced mutation occur with animals viruses.动物病毒的突变有自发突变和诱发突变。
- C.He and Salvador Luria independently demonstrated the occurrence of spontaneous mutation in both bacteriophages and hosts.他和卢里亚分别证明了噬菌体及其寄主中的自发突变。
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