The product is made from hydroxy fatty acids lithium soap thickening high-grade basic oil and high-performance additive.

本产品由羟基脂肪酸锂皂稠化高级基础油并加入高效添加剂制成，是城市地铁轮轨的专用润滑脂。

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If the student hasn't mastered the basic concept, we will make sure that the grade scheme gives a failing grade.

如果学生没有掌握基本的概念，我们会确保,成绩将会不及格。

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And Robin van Persie was likely learning basic arithmetic in about second grade.

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The average scores were categorized at each grade level into four groups: below basic, basic, proficient, and advanced.

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As a result, the percentage of people with 9th grade education (i.e. basic education) rose from just 9% in 1970 to 41.4% in 1998.

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