positive set直接用上条柄拨针,固定位置,正集positiveadj.积极的；肯定的；明确的；正面的；正数的；阳性的n.正面；正数；正片；[语]原级positive- and negative-current正负序电流positive characteristic distortion正特性失真positive displacement refrigerator容积式制冷机positive end-expiratory pressure呼气末正压, 呼气末正压通气positive conditional reinforcement正条件性强化positive almost periodic solutions正概周期解Positive and Negative in Cognition认知上的肯定项和否定项positive definite Hermitian matrixpositive-going threshold voltage正向阈电压positive sequence directional rela正序方向元件