rad·i·cal·ism /ˈrædɪkəˌlɪzəm/
激進主義
Rad·i·cal·ism n. The quality or state of being radical; specifically, the doctrines or principles of radicals in politics or social reform.
Radicalism means root work; the uprooting of all falsehoods and abuses. --F. W. Robertson.
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radicalism
n : the political orientation of those who favor revolutionary
change in government and society