n (1)部分，一段(块)(part that is divided or separated)[C]：a～of a railway/a route铁路/路线的一段;a～of house/garden/family estate 房子/花园/家产的一部分;a dangerous～of the motorway 公路的危险路段;a non-smoking～of the restaurant 饭店的禁烟区;the written～s of the examination 考试的笔答部分;the practical～of the course 该课程的实践部分;divide the area into two～s 把区域分成两片;devide the class/orange into three～s 把班级分成三部分/把橘子分成三份;〖同〗part，division，portion;

(2)地区(段)(district area of a town，county，or country，etc)[C](尤AmE)：a business/shopping/residential/wealthy/downtown～(of town)(市内的)商业/购物/住宅/富人/繁华区;the～of desert surrounding the oasis绿洲周围的沙漠地区;〖同〗district，area，region;

(3)(机构等的)部门(处，科，股，组)(part，division or department of an organization，institution，etc)[C]：the information/Western Europe/decoding～情报处/西欧司/解密组;geography～of the library图书馆的地理部;furniture～of the business商店的家具处;be transferred to the record-keeping～of the organization 被调到机构的档案管理科;play in the wind～of the orchestra在交响乐团的管乐队演奏;

(4)(书的)节，(报纸的)栏，(法律的)款(项)等(part of writing，as of a newspaper，chapter，legal code，etc)[C]：the sports/arts/financial～of the paper报纸的体育栏/艺术栏/金融栏;study/read the first～学习/阅读第一节;Chapter V has three～s.第五章有三节。～two of the bylaws/treaty 地方法规/条约的第二款;〖同〗part;

(5)小集团;一部分人(separate group within a body of people)[C]：various～s of society社会中的不同阶层 ;all～s of public life社交生活中的所有阶层;the revolution～s of the working class 工人阶级中的革命派;Soldiers make up only a small～of the population.军人只是人口中的一小部分。

(6)部(组，零)件(one of a number of parts that can be fitted to make a whole)[C]：four～s of a model/a pipe/a fishing rod四组合模型/四根套管/四节渔竿;fit together the～s of the machine把机器的各个部件组装起来;The bookcase comes apart into～s.书橱可拆成几个部分。The building was delivered in～s and assembled on the site.楼房分部件运到工地，就地安装。

(7)纵剖(断，切)面(representation of a solid object as if cut straight through from top to bottom and looked at from the side)[C]：a～of soil/human brain/the stem of a flower土壤/人脑/花径的剖面;a～through a lung肺部断面;

(8)切片(面)，切开的部分(very thin flat piece cut or separated to be looked under a microscope)[C]：a～of tissue细胞组织的切片;send a～of cancerous tissue to the lab for microscopic examination把癌细胞组织切片送到实验室，用显微镜进行观察;〖同〗slice，cutting，sample;

(9)切开(除)(cut，esp medical one made in part of the body in an operation)[U]：the～of the nerve fibres/a diseased stomach/a blood vessel切割神经组织/胃的病变部位/血管;

vt(1)将……分成部分(cut or divide sth into sections)[T+n，T+n+prep]：～a class for oral drills把班级分成小组进行口语练习;～a rock for examination 将石块切成薄片进行观察研究;～a library into subject areas 把图书馆按不同科目划分;

(2)切除(开)(separate tissue，etc surgically)[T+n];

→′sectional adj 组合的，社会某群体的;′sectionalism n 本位主义;′sectionalist adj 本位主义者;′sectionalize，-ise v 使具有地方性，把……分成段;

【辨异】section与part¹、piece和portion的区别见PART¹。