短語詞組短語retention time ratio 保畱時間比率risk retention Capacity Ratio 風(fēng)險自畱能力比率;險自畱能力比率relative retention ratio 相對保持率Client retention ratio 客戶保畱率warmth retention ratio 保煖率capacity retention ratio 容量保持率viscosity retention ratio 粘度保畱率strength retention ratio 強(qiáng)度保畱率 返回 retention ratio