doctrine
noun [ C or U ] uk/ˈdɒk.trɪn/ us/ˈdɑːk.trɪn/
（尤指政治或宗教的）信条，教义，学说
a belief or set of beliefs, especially political or religious ones, that are taught and accepted by a particular group
Christian doctrine 基督教教义
The president said he would not go against sound military doctrine. 总统说他不会反对行之有效的军事学说。
Synonym: ism
Compare: school of thoughtphilosophy