n (1) 底(座)，基础 (bottom of sth， esp the part on which sth rests or is supported) [C]：Soft ground makes a poor～for buildings.松软的地面不适合盖楼房。the～of a pillar/a column/a building/a mountain/a machine 柱子/柱子/建筑物/山/机器的基座(部);the～of the thumb大拇指的基部; near the～of the bird's tail 鸟尾的基部附近;at the～of a cliff在悬崖底部处;the lamp～灯座;The～of the statue is made of stone.这座雕像的基座是石造的。stand/rest on a ...～立/置于……的底座上;〖同〗bottom， foundation， stand， support;〖反〗top， peak;

(2) 起点， 基点(础) (standing point; part from which sth develops or originates) [C] (fig)：This innovation was regarded as a sensible～for teaching and research. 这一新思想被视为教学与研究的合理基础。the～of one's argument/for the novel/of needed reforms辩论的根据/小说的原型/必要改革的基础;use a novel as the～for a film以一小说作为一电影的素材;The league had no real power～on which it could build.该联盟没有赖以建立的真正权力基础。～rate 基础利率;〖同〗foundation，basis;

(3) 基地，根据地 (central place or starting-point at which armed forces， expeditions， etc have their supplies stored) [C]：on an air/army ～在空军/部队基地;on a naval/supply/missile/training/revolutionary/military～在海军/供给/导弹/训练/革命/军事基地;return to one's～camp 回(登山)大本营;The submarines returned to the～.潜艇返回基地。use a city as a～for one's travels in a country 把一个城市作为在一个国家内旅行的基地;The company made the city their～.这家公司以这个城市为基地。establish/set up/maintain a～建立/设立/保持一个基地;〖同〗camp;

(4) 群众(地域)基础(尤指政治上者 )(group or area favourable to a person， political party， plan， etc) [C]：She rose to power without a～of support in the working class. 她执政没有工人阶级支持的群众基础。

(5) 底线(边) ((in mathematics) line or surface on which a figure stands) [C]：the～of a triangle/a pyramid三角形的底边/锥体的底面;draw a square on the～(line)“ab”在底边ab上画一正方形;

(6)基数 ((in mathematics) number on which a system of numbers is built up) [C]：Ordinary numbers use～10， but many computers work to～2. 普通数字以10为基数， 但许多计算机用2作基数。The decimal system uses 10 as a～.十进制以10为基数。

(7) 基本成分 (chief element or substance of a mixture) [C]：a drink with a rum～以兰姆酒为基本成分的饮料;The soup has a tomato～.这汤主要是用西红柿做的。This paint has oil as a～. 这种颜料以油为基本成分。a paint with an oil～以油为基本成分的颜料;

(8) 垒 ((in the game of baseball) any of the four positions to be reached by a runner)[C]：get back to～回到垒中;the～runners 跑垒的运动员;

off base 1) 有错 (AmE)(infml)：Your idea is completely off～.你的想法完全错了。2) 未加准备 (AmE)(infml)：Her question caught him off～.她的问题难住了他。

→′baseless adj 无根据的;′basement n 地下室;′baseline n (网、棒)球场底线;basic adj;basis n;

vt (1) 以……为根据(基础)，基于 (use sth as a foundation， evidence， etc for sth else) [T+n+prep(on)]：The house is～d on solid rock.这房子建在坚固的岩石上。～one's opinions on facts/the evidence使自己的意见以事实/证据为依据;～one's hopes on the good news把那好消息作为希望的根据;～a judgement on available evidence根据可得到的证据进行判断;What do you～your accusations on? 你根据什么提出控告? The novel is～d on historical facts. 这部小说以历史事实为基础。The song is～d on an old folk tune. 这首歌曲以一只古老的民歌为基调。The movie is～d on a scientist's life. 这部电影以一位科学家的一生为原型。Direct taxation is～d on income.直接税根据收入计算。The new agreement is～d on his proposal. 新的协议是以他的建议为基础拟定的。

(2) 把……派驻于…… (place sb in (a place from which to work and travel)) [尤pass：T+n+prep(in/at)，T+n+adv]：The headquarters/Most of our staff are～d in New York. 总部设在/大多数工作人员驻在纽约。Our group was～d in Paris.我们小组派驻在巴黎。We～part of our fleet in the Pacific. 我们把部分舰队驻扎在太平洋。Where are you～d now? 你们现在被派驻在什么地方? 〖同〗 station， locate;

【辨异】base与basis和foundation都指“基础”。base多用于具体意义，指支撑物体的底部，如：the base of a lamp (灯座);basis多用于比喻意义，指抽象的基础，如：basis of friendship (友谊的基础)。这两个词的形容词都是basic。foundation 仅指建筑物地面以下的基础部分，如：the foundation of a skyscraper(摩天大楼的地基)。