(同某人）以物易物;以（财产或劳务等）作交换：[VN] The Zoca〖peopZe bartered
wheat/or took.当地人用小麦
换取工具。◊ [V] 77ie
prisoners tried to barter with the guards /or ftems Hfce writing paper and
books.囚犯们
试着从看守那里换取稿纸和书之类的东西。►barter noun [U] ： The islanders use a
system of barter instead of money.岛上的居民实行的是以物易物，而不是用货币。
basal /'beisl/ adj. {technical forming or
belonging to a bottom layer or base底层的；基部的；基底的：basal ceHs qf the sfcfn皮肤基底细胞
bas-alt /'baesoilt; NAmE be'sorlt/ noun
[u] a type of dark rock that comes from volcanoes
玄* 岩（火山岩，
深色)
base /beis/ noun, verb,
adj.
後 noun
►
LOWEST PART 底部 1
[C，usually sing.] the
lowest part of sth, especially the part or surface on which it rests or stands 根查；基底；底座.：the base 〇/ a coiumn/ gtos 柱基；玻璃杯座 〇a_ pam at the base 〇/ the spine脊柱末端如螽痛〇rhe iamp has a heayy
base•这盏 灯的底座很 。一 picture 〇 arch, bed o note at
BOTTOM
►
ORIGINAUDEA/SITUAT丨ON 根源思想 /
状况 2 [C] an idea， a fact, a situation,
etc. from which sth is developed 根据；出发点 0331 basis: She used her family’s history 〇5 a base/or her nove〖.她以她的家族史作为小的素材。
0 His arguments have a sound economic base,
有充分的经济上的根据。〇 note at basis
►
OF SUPPORT/INCOME/POWER 支持；收入；力 tfl
3 [C,
—
usually sing.] the people,
activity, etc. from which sb/sth gets most of their support, income，power, etc.(支持、
收入、力量等的）来源，源泉，基础：rhesepoHdeshave a
broad base 〇/ sup彳ort.这些政策受到广泛支持。◊ an economy with a solid manufacturing base f(] ia ik
^3 坚实基础的经济体一see also CUSTOMER BASE, POWER BASE
►
F丨RST/MA丨N SUBSTANCE 首要厂基本材料 4
[C，usually sing.] the
first or main part of a substance to which other things are added ^合物的首要（或主要）成分：a drink with a rum
base主要成分为朗姆酒的饮料◊ Put some moisturizer
on as a base before applying your make-up. 化妆前先搽些润肤霜打底。
►
MAIN PLACE 要地方,5 [C] the main place
where you live or stay or where a business operates from 据点；总 部；大本营：I spend a lot of time
in Britain but Paris is stiH my base.我有很多时间在英国度过，但主要还是磨住
在巴 _。〇 The town is an ideal base
for touring the area.这个镇子是在这一地区旅游观光的理想据点。〇771£ company has its base in New York, and branch offices
all over
the worW•公司总部设在纽约，夯支遍及全世界。
►
OF ARMY，NAVY，ETC.陆军、海军卞 6 [C，U] a place where an army，a navy, etc. operates
from 是地：a military/ naval base:罕拳/'海军基地◊ an air base空军基地◊ A_/iter the
attacfcj they returned to base•他们发动攻击之后
返回T基地。
►
CHEMISTRY.化号' 7 [C]
a chemical substance，for example an alkali,
that can combine with an acid to form a salt
碱
►
MATHEMATICS 8 [C, usually sing.] a
number on which a system of counting and expressing numbers is built up, for
example 10 in the decimal system
and 2 in the binary system基数（如十进制的10和二进制的2 )
►
IN BASEBALL/ROUNDERS 棒球；_场棒球 9 [C] one of the four positions that a
player must reach in order to score points 全
—see
also database IMI off base (NAmE, informal) completely wrong about
sth 完全错误：If thafs what you thinfc, you’re way
o# base.你如果那么想就全错了。
—more
at cover v., first base, touch v.
a verb [VN] [usually
passive]〜sb/sth/yourself in …to
use a particular city, town, etc. as the main place for a business,
holiday/vacation，etc•以…为据点（'或.总部
等）:；把（总部_ )设在：77iey decried to .base
the new company in 7orfc.他们决定将新成立的公司总部设在约克
郡。〇 We}re
going to base ourselves in Tokyo and make trips from there.我们将以东京为据点到各地旅行。
tjfliiTJ base sth on/upon
sth to
use an idea, a fact, a situation, etc. as the point from which sth can be
developed 以…为基础（诚根据）：What are you basing