短語詞組短語discrete boundary value problems 離散邊值問題discrete extreme value 離散極值discrete control value 控制量離散Singular discrete boundary value problem 奇異離散邊值問題Discrete mean value -level set 離散均值discrete value of hardness 硬度的離散值discrete value s 不連續(xù)值discrete Lidstone boundary value problem 離散Lidstone 返回 discrete value