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- R-左消幺半群R-left cancellative monoid
- 左可消幺半群left cancellative monoid
- 左消去幺半群Left cancellative monoid
- 消news
- 左R-可消幺半群left R-cancellation semigroup
- 左left
- 可消幺半群cancellative monoids
- 她说话带着乡下人的轻柔的r音。She speaks with a soft rural burr.
- 向左sinistrad
- R-SBFR-SBF
- 右可消幺半群right cancellative monoid
- R&D资金research and development fund
- 左对齐flush left
- R&D合作R&D cooperation
- 比左消去法Bezout's elimination
- 空间E-R模型Spatial E-R model
- 厚向异性系数rcoefficient of normal anisotropy r
- 挠自由可消幺半群torsion-free and eaneellative monoid
- 左下角lower left corner
- （R）-2-三甲基硅-2-羟基丙腈( R )-2-trimethylsilyl-2-hydroxyl-ethyleyanide
