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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Information gathered by an organization shows half of all Pakistani children in the 5th grade do not understand basic mathematics and cannot read a story in their language.

一个组织收集的信息显示，在巴基斯坦，五年级有一半的儿童不懂基础数学，也不会用他们的语言阅读故事。

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When I was in the the fifth grade, I started learning BASIC computer programming, so that exposed me to even more problems.

在五年级的时候，我开始学习BASIC计算机编程，所以遇到了更多的问题。

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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。

麻省理工公开课 - 固态化学导论课程节选

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.

CNN: Report card shows U.S. students need to improve math skills

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.

UNESCO: Bilingual Literacy for Life