您要查找的是不是：
- three grades & six levels 三级六等
- After five years of hard work they presented a high quality textbook, which consisted of six levels from grade 4 to grade 9. 经过五年的艰苦工作，他们完成了一套高质量的教材。该书分为六级，从小学4年级到初中3年级。
- There are eighteen classes in three grades. 三个年级有十八个教室。
- My name is YangXi I'm from Class three Grade eight. 我来自本溪市第八中学八年三班。
- The standard defines six levels of CoS. 该标准定义六级cos。
- After five years of hard work they presented a high quality textbook,which consisted of six levels from grade 4 to grade 9. 经过五年的艰苦工作，他们完成了一套高质量的教材。该书分为六级，从小学4年级到初中3年级。
- Star of this week is Xia Xinjie from Class Three Grade Eight. 今天要介绍的一周之星是八（3）中队的夏欣杰。
- After severalyears endeavor, I already passed six levels of tests. 经过几年的努力，我已经通过了六级考试。
- At present, Russia imported stationery can be divided into three grades. 目前,俄罗斯进口文具可分为三个档次。
- Results Mitral valve and tricuspid valve prolapse were classed three grades. 结果二、三尖瓣脱垂分为三级。
- The English six levels asked how many minutes the hearing 8 did read 17 glossaries 18 to change the wrong 5 theses to write three sections only to write two section of me to have? 您的位置：我也知道>教育/科学>外语学习>英语六级的问一下听力8阅读17词汇18改错5作文要写三段的只写了两段我有多少分啊？
- Group classes are available at six levels from Elementary to Advanced. 小组班别均设于六个初级至高级程度。
- As a general rule, you should limit hierarchies to six levels or fewer. 通常来讲,应将层次结构限制在六级或更少级别。
- The results of the annual appraisal shall fall into three grades: excellent, competent and incompetent. 第二十五条年度考核结果分为优秀、称职、不称职三个等次。
- Take on six levels of carnage, each with a dastardly boss to defeat. Take在六次水平的大屠杀，每一个跟一个怯懦的老板一起打败。
- Airlines generally divided into first-class fares, business class and economy class in three grades. 答：航空公司票价一般分为头等舱、公务舱和经济舱三种等级。
- 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;
- Objective:To quantitatively estimate the blood flow parameters of intrarenal three grades artery. 目的：为了探索肾内三级动脉血流动力学参数的正常范围。
- Biopolymer XC owns a singularity three grades composition which can resolve a series of problems occured during horizontal well drilling. 生物聚合物XC的特殊三级结构使它能够协调解决水平井施工中所遇到的一系列问题。
- Why were there six levels of heading, and when was it appropriate to use each of them? 为何有六层标题,什么时候使用合适?
