The levelling net points are divided into three grades.

并将水准网点的活动水平分为三类。

youdao

Steel welds are classified into three grades in order to evaluate their quality.

按照焊缝质量级别确定的原则，将焊缝级别分为三个等级；

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The results suggested: (1) In peer group activity, the children of three grades had obvious gender stereotype.

结果发现，（1）在同伴群体活动中三个年龄段的儿童都存在着明显的性别刻板印象。

youdao

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