短語(yǔ)詞組短語(yǔ)branching g decay 分支衰變multiple branching decay 多分支衰變branching ratio of decay 衰變分支比decay branching 分支衰變decay branching fraction 衰變分支比decay branching ratio 衰變分支比decay branching ratios 躍遷分支比 返回 branching decay