短語詞組短語branching g ratio 分支比branching ratio of decay 衰變分支比auger branching ratio 俄歇分支率fluorescence branching ratio [激光]熒光分支比;熒光分支比channel branching ratio 通道分支比drainage branching ratio 水系分支比decay branching ratio 衰變分支比leptonic branching ratio 輕子分支比the branching ratio Rb 分支比R 返回 branching ratio