字头A
a(an) - ad. one; any; each

able- v. havingthepowertodosomething

about- ad. almost("abouthalf"); oforhavingarelationto("Wetalkabouttheweather.")

above- ad. atahigherplace

accept- v. toagreetoreceive

accident- n. somethingthathappensbychanceormistake; anunplannedevent

accuse- v. tosayapersonisresponsibleforanactorcrime; tomakeastatementagainstsomeone

across- ad. fromsidetoside; totheotherside

act- v. todosomething

activist（激进分子） - n. onewhoseekschangethroughaction

actor- n. someoneactinginaplayorshow

add- v. toput(something) withanothertomakeitlarger; tosaymore

administration- n. theexecutivepartofagovernment, usuallyheadedbyapresidentorprimeminister

admit- v. toaccept("admittedtotheUnitedNations"); toexpressone'sguiltorresponsibility("Headmittedthatwhathedidwaswrong.")

adult- n. agrownperson

advise- v. tohelpwithinformation, knowledgeorideasinmakingadecision

affect- v. toproduceaneffecton; toinfluence("Alackofsleepaffectedthesinger'sperformance.")

afraid- ad. feelingfear

after- ad. later; behind

again- ad. anothertime; asbefore

against- ad. opposedto; notagreeingwithsomething

age- n. howoldapersonorthingis

agency- n. anorganizationthatispartofalargergroup("anagencyoftheUnitedNations")

aggression- n. anattackagainstapersonorcountry; theviolationofacountry'sborders

ago- ad. oftimepast; beforenow

agree- v. tohavethesamebeliefassomeone; tobewillingtodosomething

agriculture- n. farming

aid- v. tohelp; tosupport; n. help, assistance

aim- v. topointagunat; n. agoalorpurpose

air- n. themixtureofgasesaroundtheearth, mostlynitrogenandoxygen, thatwebreathe

airforce- n. amilitaryorganizationusingairplanes

airplane- n. avehiclewithwingsthatflies

airport- n. aplacewhereairplanestakeoffandland

album- n. acollectionofrecordedmusic

alcohol- n. astrong, colorlessliquid, usuallymadefromgrain, usedasadrugorinindustrialproducts

alive- ad. havinglife; notdead

all- ad. everything; everyone; thecompleteamount

ally- n. anationorpersonjoinedwithanotherforaspecialpurpose

almost- ad. alittlelessthancompletely

alone- ad. separatedfromothers

along- ad. nearoron("alongtheroad")

already- ad. beforenow; evennow

also- ad. addedto; too

although- conj. evenifitistruethat

always- ad. atalltimes; everytime

ambassador- n. anation'shighestdiplomaticrepresentative(toanothergovernment)

amend- v. toaddtoortochange(aproposalorlaw)

ammunition（军火） - n. thebulletsorshellsfiredfromguns

among- ad. inorpartof(agroup)

amount- n. thenumber, sizeorweightofanything

anarchy- n. alackoforder; lawlessness

ancestor- n. afamilymemberfromthepast

ancient- ad. veryold; longago

and- conj. also; inadditionto; with

anger- n. astrongemotionagainstsomeoneorsomething

animal- n. alivingcreaturethatmoves, suchasadogorcat

anniversary- n. ayearlycelebrationorobservanceofaneventthathappenedinthepast

announce- v. tomakeknownpublicly; todeclareofficially

another- ad. onemore; adifferentone

answer- n. astatementproducedbyaquestion; v. tomakeastatementafterbeingaskedaquestion

any- ad. oneormoreofnospecialkind

apologize- v. toexpressregretforamistakeoraccidentforwhichoneacceptsresponsibility

appeal- v. totaketoahighercourt, personorgroupforadecision; tocallonsomebodyforhelp

appear- v. toshowoneself; tocomeintosight; toseem

appoint- v. toname; tochoose("appointajudge")

approve- v. toagreewith; toagreetosupport

archeology（考古学） - n. thescientificstudyofpasthumanlifeandactivities

area- n. anyplaceorpartofit

argue- v. toofferreasonsfororagainstsomething; todispute; todisagree

arms- n. militaryequipment; weapons

army- n. militarygroundforces

around- ad. oneveryside(of)

arrest- v. toseizeapersonforlegalaction; totakeasaprisoner

arrive- v. tocometoaplace, especiallyattheendofatrip

art- n. expressionsorcreationsbyhumans, suchaspaintings, music, writingorstatues

artillery- n. bigguns

as- conj. equally("asfastas"); when; while

ash- n. thepartleftaftersomethingburns

ask- v. toquestion; tosaysomethingiswanted("Weasktheteacherquestionseveryday.")

assist- v. tohelp

astronaut- n. apersonwhotravelsinspace

astronomy- n. thescientificstudyofstarsandtheuniverse

asylum（避难） - n. politicalprotectiongivenbyagovernmenttoapersonfromanothercountry

at- prep. inornear("attheedge"); where("lookat"); when("atnoon")

atmosphere- n. thegasessurroundinganystarorplanet

attach- v. totietogether; toconnect

attack- n. aviolentattempttodamage, injureorkill; v. tostartafight

attempt- v. toworktowardsomething; totry; tomakeaneffort

attend- v. tobepresentat

automobile- n. avehiclewithwheelsusedtocarrypeople; acar

autumn- n. thetimeoftheyearbetweensummerandwinter

average- n. something(anumber) representingthemiddle; ad. common; normal

avoid- v. tostayawayfrom

awake- ad. notsleeping

award- n. anhonororprizeforanactorservice

away- ad. notnear