英文關鍵字
bacteria
death
dna
experiment
gene
genetic
griffith
injected
injection
mice
mouse
nonvirulent
observatory
pneumoniae
research
strain
streptococcus
testing
virulent
英文關鍵字
bacteria
death
dna
experiment
gene
genetic
griffith
injected
injection
mice
mouse
nonvirulent
observatory
pneumoniae
research
strain
streptococcus
testing
virulent