n (1) 1)阶级(层)(group of people having the same social or economic standing)[C，Gp]：To which～do you belong? 你是什么阶级? the working/ruling/middle/upper/lower～劳动/统治/中等/上层/下层阶级;the professional～(es)专门职业阶层;2)阶级制度(system according to which people are divided into such groups)[U]：～differences/distinctions/divisions/conflict/status 阶级差别/界限/划分/冲突/地位;～wars/struggles/systems 阶级斗争/斗争/制度;a society ruled by～阶级统治的社会;

(2)班级;(年)级(group of students taught together at school or college or (AmE) graduated from a school or university in a particular year)[C，Gp]：The～is 40 in number.这个班有40名学生。The class are，in general，very bright.这个班的学生总的来说都很聪明。belong to/be in the same～是/在同一个班;be in the～above sb at school中学时比某人高一年级;the first-year/second-year/freshman/senior/junior～一年级/二年级/新生年级/高年级/低年级;the～of(19)68/'68 68届;〖同〗grade，(BrE) form;

(3)一堂课(period of time during which students are taught together)[C]：a maths/French/language～数学/法语/语言课;take evening～es in German晚上上德语课;have/attend a～in economics at ten o'clock 10点上经济学课;before/after/during/in～课前/课后/上课过程中/上课时;〖同〗course，lesson;

(4)类(别)，等级(division of people，animals or things grouped together，esp according to quality)[C]：Those problems(books/people)fall/can be divided into several～es.那些问题(书/人)分为/可分成几类。The dog won first prize in its ～ in the dog show.这条狗在狗展上同一类别的狗中获一等奖。a top～athlete最佳运动员;〖同〗division，classification，kind;

(5)纲((biology)division of animals or plants below phylum and usu including several orders)[C]：Plants can be divided into～es.植物可分成纲。We can identify several～es of fern.我们可以辨认出好几个纲的蕨类植物。Pine trees belong to the evergreen～.松树属于常青纲。〖同〗classification，group，division，kind;

(6)(车、船、飞机、旅店等的)等级(different levels of quality of sth(eg travel， hotels，shops，etc))[C](尤见于合成词中)：go(travel) first/second～ 坐头/二等(舱/车厢);buy tickets for first～买一等(舱/车厢)票;a first-～(second-～) compartment/cabin/smoker/ticket 一(二)等车厢/舱/可抽烟的车箱/票;

(7)(考试成绩)等(级)(division of university degrees or examination results，according to their quality)[C](AmE中不用;尤见于合成词中)：a first-/second-/third-～degree 一/二/三等;What～(of degree) did you get： first，second，or third ? 你得了几等?一等，二等，还是三等?

(8)气质，风度(high quality that makes one look as if one has high social rank)[U](infml)：His girl friend really has(got)(real/great/a lot of)～.他的女朋友确是气质不凡。The restaurant has～. 这家饭店有气派。a～(tennis)player 一个有风度的(网球)运动员;

→′classmate，′class-fellow n 同班同学;′classroom n 教室;′class-conscious adj 有阶级意识(觉悟)的;′classless adj 没有阶级的;′classy adj 有品味(高级)的;′classify v;

vt分类(级)(regard as being of a certain type)[T+n，C+n+n/adj;C+n+prep(as)]：be～ed as an abstract expressionist被视为抽象表现派画家;North Carolina is～ed as an agricultural state.北卡罗来纳被视为农业州。～a book as a mystery novel把一本书划归为神秘小说;～a man as fool把一个男人视为傻瓜;～a woman as stupid 认为一个女人愚蠢;〖同〗classify，group;

【注意】名词class 当“班级”讲时是集合名词，作主语时谓语动词数的使用(见(2)中第1、2两例)见 AUDIENCE。