Those in the control group not only didn't see a grade increase, they had lower grades than the grading before the study began.

对照组的学生不仅成绩没有提高，而且比研究开始前的成绩还要低。

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This unit group includes excavating, grading, paving, drilling and blasting contractors who own and operate their own business.

本单元组包括拥有和经营自己生意的挖掘，分级，铺路，钻井和爆破承建商。

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Recommendations were graded using methods adapted from the us Preventive Services Task Force and the Grading of Recommendations, Assessment, Development, and Evaluation Working Group.

建议进行分级使用从美国预防服务工作队的适应方法和建议，评估，开发和评价工作组定级。

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He said his union, the Association of School and College Leaders, which is part of a group threatening a judicial review of the grading decisions, had amassed a vast amount of feedback from schools over the past few weeks.

BBC: GCSE fiasco 'leaves schools with failing tag'