正反: positive and negative应: answer; respond to; echo阳性反应；正反应；正反力。: positive reaction翻正反应: righting reaction; righting response正反应常数: forward rate constant正反应性: positive reactivity阳性反应, 正反应: positive reaction正向反应，正反应: forward reaction正反: positive and negative 总结正反两方面的经验 sum up both positive and negative experience; 正反两方面的看法 the pros and cons; 正反配板法 book matching; 正反射 normal reflection正反差: dark contrast; positive contrast; positvei contrast正反对: antithetic; contradictory正反合: dopamine; japan ver; mnet 20s choice正反交: reciprocal crosses; reciprocal crossings正反馈: feedback positive; feedforward; positive regeneration; positivefeedback; regenerate; regenerative feedback正反力: positive reaction正反码: positive and inverse code正反面: pros and cons正反器: flip-flop正反射: front reflection; normal reflection; normal reflecton; regular reflection正反握: alternate grip; combined grip正反向: forward and reverse暗反差；正反差: dark contrast标志正反器: flag flip-flop成正反比: a is positively proportional to储存正反器: storge flip-flop
