positive arc正弧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 top front rake正前角positive-ion emission正离子发射positive self-feeling积极自感positive responsiveness正向响应性质positive bending moment正弯矩Positive detective rate阳性检出率positive pressure cabin气密座舱, 增压座舱positive scanning shift正移扫描positive stable matrice正稳定矩阵positive-sense genome正义基因组