1. vt. & vi.扩大；加大；使大　 make larger
2. vt. & vi.展开　 unfold or spread out

　～ armaments　扩充军备
　～ the chest　使胸腔扩展
　～ contact　扩大交往
　～ drainage capacity　增强排水能力
　～ influence　扩大影响
　～ market　扩大市场
　～ production　扩大生产
　～ ranks　扩大队伍
　～ ties　扩大联系
　～ view　阐述观点
　～ constantly〔gradually〕　日益扩大
　～ fully　充分地扩张
　～ greatly　大大扩大
　～ out　扩展
　～ rapidly　迅速发展
　～ steadily　稳定地发展
　～ by　因…而扩大
　～ from...to...　从…增加到
　～ in　在…中发展
　～ into　扩大成
　～ into an industrial city　发展成工业城市
　～ on　进一步阐述，详谈
　～ on a problem　对某个问题加以阐述
　～ upon　根据…阐述

　The shipbuilding industry is rapidly expanding.　造船工业正在迅速发展。
　The ranks of the teachers are constantly expanding.　教师队伍日益扩大了。
　Our foreign trade has expanded during recent years.　我们的对外贸易近年来已得到扩大。
　The pupils of your eyes expand when you enter a darkroom.　当你走进暗室时，你的瞳孔就会放大。
　Iron expands when it is heated.　铁加热时膨胀。
　The flower buds have not yet expanded.　花蕾尚未开放。
　The petals of many flowers expand in the sunshine.　许多花瓣在阳光下绽放。
　He began to expand after dinner.　饭后，他变得友好亲切起来。
　Heat expands metals.　热使金属膨胀。
　He does exercises to expand his chest.　他做体操扩胸。
　Because the company was doing more business it was necessary to expand the factory.　由于公司业务的扩大，扩大工厂是必然的。
　Our country steadily expanded her electronic industry.　我国不断发展自己的电子工业。
　She expanded her umbrella and went out.　她撑开伞就走出去了。
　The eagle expanded its wings.　雄鹰展翅。
　A hundred years after Confucius died, Mencius taught and expanded Confucian doctrine.　孔子去世100年后，孟子传授并阐发了孔子的学说。
　The docks have been expanded.　码头已经被扩建了。
　The ancient city walls were demolished and the urban area was expanded.　古城墙被拆掉了，城区被扩大了。
　The existing network of medical and health institutions are being expanded.　现有的医疗卫生组织系统正在扩大。
　The business has been expanded this year.　今年的生意扩大了。

 ♣ expand into　(v.+prep.)
　（使）扩展，将…扩充成　enlarge sth to become wider
　The company intends to expand into a wider market.　这家公司打算进一步扩大市场。
　The society expanded into a worldwide organization.　这个社团已扩大成为一个世界性的组织。
　The narrow path expanded into a wide road.　狭窄的小路拓宽成一条大道。
　The saplings have expanded into trees.　那些树苗已经长成了大树。
　He expanded his short story into a book.　他把他的短篇小说扩充成一本书。
　The director plans to expand the firm into an international company.　主任计划把这个公司扩展成为跨国公司。
　The writer expanded one sentence into a paragraph.　作家把一个句子扩展成一段文字。
　The small pocket dictionary was expanded into a full-sized one.　那本袖珍字典已扩展成为一本大型字典。
 ♣ expand on　(v.+prep.)
　进一步阐述，详谈，补充　express oneself more fully or in greater detail on
　You will have to expand on your argument if you want to convince me.　你要想说服我，你就得充分阐明你的论点。
　He did not expand greatly on his statement.　他未就他的声明多加解释。
　In his lecture the teacher expanded on the uses of the English subjunctive mood.　老师在讲课中详细地讲述了英语虚拟语气的用法。
　I am quite satisfied with your explanation, so there's no need to expand on it.　我对你的解释很满意，没有必要再细说了。
 ♣ expand to　(v.+prep.)
　扩展到…　enlarge to
　The factory expands to the foot of the mountain.　这个工厂的地界扩展到了山脚下。
　The town has now expanded to twice its original size.　这个镇现已扩展到原面积的两倍。
　The business has expanded from having one office to having eight.　这家公司已从一个公司发展到拥有八家分公司。
　There sugar-beet plantation areas were expanded to 176000 hectares.　他们的甜菜种植面积增加到176000公顷。
　Transport networks need to be expanded to remote rural areas.　运输网需要扩展到偏远的农村。

 ♣ expand, circulate, diffuse, disseminate, extend, propagate, radiate, spread
　参见spread条。
 ♣ expand, dilate, distend, inflate, swell
　这组词都有“增大，扩大”的意思。其区别是：expand指体积、数量的增大，可指展开、打开、散播开，而使其扩大的因素既可以是内在的，也可以是来自外界的外力；swell是指由于受到内部力量的作用而在体积和容积方面增大，也可指数目或程度的增长，质量的提高，或曲面向上隆起，常表示“不正常的增大”; distend指在内部力量的压迫下向各个方向扩张或膨胀，暗示原来就处于完全空虚或松弛状态；inflate指用人工方法使某物膨胀起来；dilate强调直径的增大。