Hfr 菌株；高频重组菌株Hfr strain
高频率high frequency
高频重组菌株high frequency of recombination strain, Hfr strain
高频重组high frequency of recombination, Hfr
高频率重组Hfr (high frequency) of recombination)
高频重组hfr
高频重组high frequency of recombination, Hfr
高频重组菌株high frequency (of ) recombination strain