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A low number; a low grade of oil. 一个小的数; 低级油
low grade reduction 低级粗粒粉磨碎
John is down on his teacher because she gave him a low grade. 约翰恨他的导师，因为她给他打了低分。
My son mucked up the car engine by using cheap, low grade gasoline. 我的儿子使用便宜的低级汽油,汽车引擎损坏了。
Low grades are getting Hellen down. 低分数使海伦闷闷不乐。
He is a bit let down by the low grade he got. 这次成绩不好, 他有点气馁。
Low grades are get ting Helen down. 考分很低使海纶闷闷不乐。
My son muck up the car engine by using cheap, low grade gasoline. 我的儿子使用便宜的低级汽油,汽车引擎损坏了。
Papers submitted after the due date will be considered late and receive a grade reduction. 截止日期以后缴交的论文视作迟交，分数降低一级。
The teacher remonstrated with the boy about his low grade. 教师告诫男孩,说他的分数太低了。
My son muck up the car engine by using cheap,low grade gasoline. 我的儿子使用便宜的低级汽油，这把汽车引擎损坏了。
Low quality is always a problem; low grade may not be. 质量低常成为一个问题，但等级低则不是。
The teacher remonstrated with the boy about his low grades. 教师告诫男孩，说他的分数太低了。
Untreated low grade rejection also poses an increased risk for CAV. 为CAV未处理的低等级拒绝也形成增加的风险.
Non Ai lenses can mount on low grade nikon DSLR body??? 用尽旧镜微距能力，专人指导使用微距滤镜，拍尽微距世界！
He tore up his test paper so that his mother wouldn't see his low grade. 他把自己的考卷儿撕了,这样他的母亲就不会看到他得的低分数。
Phase changes at different temperatures and holding time during the carbothermal reduction nitridation process for synthesizing SiAlON from low grade bauxite were researched by XRD,SEM and EDS. 采用XRD、SEM和EDS等手段 ,研究了低品位铝土矿碳热还原氮化合成SiAlON过程的相变。结果表明 :130 0℃开始氮化 ,形成Si2 N2 O和X SiAlON ;
Low grades are getting him down. 低分数使他郁郁不乐。
He tore up his test paper so that his mother would not see his low grade . 他把自己的考卷儿撕了，这样他的母亲就不会看到他得的低分数。
I need to lecture my son about his low grades. 我儿子学习很差，得教训教训他了。