| [/beɪs; bes/] n 用法:
1 (a) lowest part of sth, esp the part on which it rests or is supported （某物的）底部; （尤指）底座, 基底:
the base of a pillar, column, etc 柱基等.
(b) (geometry 几) line or surface on which a figure stands 底边; 底面:
the base of a triangle, pyramid, etc 三角形的底边、角锥体的底面等.
(C) (fig 比喻) starting-point; underlying principle 起点; 基本原则:
She used her family's history as a base for her novel. 她把她一家人的经历作为她小说的蓝本. *
His arguments had a sound economic base. 他的立论在经济方面是有充分根据的. 用法:
2 (chemistry 化) substance (eg an alkali) capable of combining with an acid to form a salt 可与酸化合成盐的物质（如硷）; 盐基. 用法:
3 main part or ingredient to which other things are added 混合配料的主要成分:
a drink with a rum base 以朗姆酒为主要成分的饮料 *
Some paints have an oil base. 有些颜料是以油脂作为主要成分. *
Put some moisturizer on as a base before applying your make-up. 使用化妆品之前先用点润肤脂打底. 用法:
4 place at which armed forces, expeditions, etc have their stores （军队、探险队等的）基地, 根据地:
a `naval base 海军基地 *
an `air base 空军基地 *
[attrib 作定语] a base camp, eg for a mountaineering expedition 大本营（如为登山队所建者） *
establish, set up a base 建立、设立根据地. 用法:
5 (mathematics 数) number on which a numerical system is built up, eg 10 in the decimal system, 2 in the binary system 基数（如十进制系统以10为基数, 二进制系统以2为基数）. 用法:
6 (in baseball) each of the four positions to be reached by a runner （棒球）垒. =>illus at baseball 见baseball之插图. 用法:
7 (idm 习语) not get to first base => first base (first1). off base (US infml) (a) mistaken 错误的:
You're a bit off base there. 你在那个地方有点不对头.
(b) unprepared 毫无准备的:
Her reply caught him off base. 她的答覆使他不知所措. base 2
[/beɪs; bes/] v 用法:
1 [Tn.pr] ~ sth on sth use sth as grounds, evidence, etc for sth else 以某事物为另一事物的根据、证据等:
I base my hopes on the good news we had yesterday. 我把希望寄托在我们昨天得到的好消息上. *
This novel is based on historical facts. 这部小说是以历史事实为根据的. *
Direct taxation is usually based on income, ie A person's income is used to calculate the amount of tax he has to pay. 直接税通常以收入为依据（根据个人收入计算出应交税款的数额）. 用法:
2 [esp passive 尤用於被动语态:
Tn.pr, Tn.p] ~ sb in/at... place sb in (a place from which to work and travel) 把某人安置在（某地进行工作和活动）:
Where are you based now? 现在把你安置在哪里工作了? *
Most of our staff are based in Cairo. 我们大部分工作人员都驻在开罗. base 3
[/beɪs; bes/] adj (-r, -st) 用法:
1 (fml derog 文, 贬) dishonourable; despicable 不光彩的; 卑鄙的:
acting from base motives 从卑鄙动机出发的行动. 用法:
2 not pure 不纯的:
base coin 搀有贱金属的硬币. 用法:
3 low in value 不值钱的:
base metal 贱金属. |