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A low number; a low grade of oil. 一个小的数; 低级油
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。
It is possible to use Gurit without damaging the surrounding rock. 使用古力特炸药将完全可能不造成对围岩的破坏。
Low grades are get ting Helen down. 考分很低使海纶闷闷不乐。
But there are inherent heat losses associated with long wellbore and heating surrounding rock formations that do not bear oil, so OSR is little and recovery efficiency is low. 但长井筒的热损失以及加热不含油岩层的热损失导致油汽比小 ,采收率低。克服热损失问题的一种潜在方法是用溶剂替代蒸汽。该方法称之为溶剂蒸气抽提法。
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。
Based on an hydraulic power engineering in high primary stress case, this paper use classification methods BQ, HC, RMR and Q system in turn to determine the quality grade of surrounding rock. 文章结合某水电工程实例，先后采用BQ分类、HC分类、RMR分类以及Q系统分类方法，分别就4种方法分类结果的相关性、吻合率和一致性等方面开展了系列对比研究和初步的成因分析。
The drilling fluid may interact with the surrounding rock in other ways. 钻井液可能会以其它方式与周围的岩石相互作用。
The teacher remonstrated with the boy about his low grade. 教师告诫男孩,说他的分数太低了。
If the volcano becomes inactive and cools, surrounding rock may be worn away. 如果火山变得不活动并冷却下来，围岩就可能被剥蚀掉。
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。
Their use made the design of roadway surrounding rock supporting safer. 这些结果的应用使巷道岩石支护的设计更趋于安全。
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。
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.
A change within an intrusive igneous rock caused by the assimilation of portions of the surrounding rock. 内变质作用由于周围岩石同化作用而在侵入火成岩内部产生的变化
The teacher remonstrated with the boy about his low grades. 教师告诫男孩，说他的分数太低了。
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！

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