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The poorest families were excluded from the three grades, and were regarded as "the families below the low-grade".

吴简中的普通民户按财产分为上品、中品和下品三个等级，而一些赤贫户则被划在这三个等级之外，称为“下品之下”。

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At Negeri 2, a senior high school with more than 1,000 students, Chinese became mandatory for all three grades starting this school year.

在南梦安国立二中，中文已经成为这里三个年级1000多名学生的必修课。

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So is it still being taught? "If the results of a survey we had published this year are accurate, it is being taught by about ninety percent of teachers in grades one to three."

VOA: special.2009.10.29

We'll also, when we grade the concept sheets, we'll give them number grades and we'll just do one, two, or three.

我们也会,在我们给观点报告评分时,我们会以数字一,二,三来打分

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Although the president has visited the Gulf coast three times since the spill began, he is getting poor grades.

VOA: standard.2010.06.10

In 2007 roughly 178, 000 aspirants took the exam for the highest of the three grades of civil servant, comprising just 24, 000 jobs.

ECONOMIST: Public-service careers

U.S. refineries were originally built to produce three grades of gasoline.

FORBES: Magazine Article

Indeed, research by exams group Cambridge Assessment found three A grades at A-level was achieved by 17.5% of students in 2009.

BBC: Aiming for the top A* at A-level