短語詞組短語necessary components for revision 修正的構(gòu)成要件A necessary condition for 必要條件necessary products for military 軍工配套產(chǎn)品necessary condition for optimalplan 最優(yōu)方案必要條件Necessary Conditions for Survival 生存必要條件necessary elements for implementation 實施要件necessary condition for optimality 最優(yōu)性必要條件necessary to for 必要的Provide necessary impetus for 給予 返回 necessary for