2) Exactly the opposite
正正相反
3) positive and negative translation
正反译和反正译
4) forward reaction
正向反应，正反应
5) direct-reverse flotation
正-反浮选
1.
As the run-of-mine ore has a high MgO content and the minerals therein are finely disseminated,direct-reverse flotation process was employed,while new types of collectors called MG and SR were introduced for direct and reverse flotation,respectively.
针对该矿石性质,采用正-反浮选工艺,以新型药剂MG和SR分别作正、反浮选的捕收剂,取得了混合精矿P2O5品位32。
6) Arc tangent
反正切
1.
The Design and optimization of arc tangent calculate circuit based on FPGA;
基于FPGA的反正切函数的优化算法
2.
Implementation of arc tangent function using assembly in fixed-point DSP based on differential evolution algorithm;
实现定点DSP汇编层反正切函数的差分进化算法
补充资料：反正
①指复归于正道：拨乱～。②敌方的军队或人员投到己方。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条