细菌战
biological warfare; germ warfare
细菌武器
biological weapon (using germs)
细菌病毒
bacteriophage; virus that infects bacteria
细菌群
bacterial community (e.g. in the gut)
奉系军阀
Fengtian clique (of northern warlords)
桂系军阀
Guangxi warlord faction, from 1911-1930
皖系军阀
Anhui faction of Northern Warlords 1911-c.1929
直系军阀
the Zhili faction of the Northern Warlords