您要查找的是不是：
- 比ratio
- 循环比RCircle ratio
- 内循环比nitrate recirculation ratio
- 循环loop
- 可调循环比flexible recycle ratio
- 她说话带着乡下人的轻柔的r音。She speaks with a soft rural burr.
- 降低循环比recycle ratio
- 性价比performance price ratio
- R-SBFR-SBF
- 循环的circulatory
- 科比Bryant
- R&D资金research and development fund
- R&D合作R&D cooperation
- 良性循环virtuous circle
- 不比unlike
- 空间E-R模型Spatial E-R model
- 配比mixture ratio
- 厚向异性系数rcoefficient of normal anisotropy r
- 血液循环blood circulation
- 环比link relative ratio
