Last year the national program for playground safety gave the nation's playgrounds a grade of "C" for safety after visiting more than 3,000 playgrounds nationwide.

去年，国家游乐场安全计划在全国范围内走访了3000多个游乐场后，将国家游乐场的安全等级定为 “C” 级。

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70% of pupils got Grade C or above.

70%的小学生成绩都在C级或C级以上。

《牛津词典》

The difference between C-grade and A-grade managers may very well be the difference between business success or failure. Between preserving the jobs of ordinary workers or losing them.

C 等和 A 等经理之间的差距很可能就是企业成败的区别，很可能就是在保住普通工人的工作或者让他们下岗之间的差异。

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Getting a grade like a B-plus or a C-minus adds or subtracts a few tenths of a point.

VOA: special.2009.03.05

It called for June's papers to be regraded in line with the January C-grade boundaries.

BBC: GCSEs row: Legal action a step closer

It resulted in a slight fall in the number of pupils achieving at least a C-grade, from 65.4% to 63.9% this summer.

BBC: GCSE English: How is it marked?

Obtaining a C-grade in GCSE English is a crucial benchmark required for pupils wanting to continue their studies at A-level or further education college.

BBC: GCSE English: How is it marked?