1.automation n．自动装置(mechanism that imitates actions of humans)

词根记忆：auto(自己)+mat(动)+ion--自动--自动装置

例:Many workers who lose their jobs to automation will need government assistance to survive.

同根词：autoalarm(n.自动报警器)

2.automobile n．汽车(a usually four-wheeled aLrtomotive vehicle)

词根记忆：auto(自己)+mobile(可移动的)--可以自己移动的--汽车

例:The automobile industry dominated the American economy in the 1920's.

同根词：automatic(a.自动的)

3.autonomy n.自治(self-government with respect to local or internal affairs)；自主（权）(the right of self-government)

词根记忆：auto(自己)+nomy(名字)--给命运写上自己的名字--自主

例:women's autonomy

派生词:autonomous(a．自主的;自治的)

4.availability n.可用性（quality or state of being available)

词根记忆：来自available(a．可用的)

例:The ample availability of land makes security of land tenure unimportant.

5.avalanch n.雪崩 (a large mass of snow, ice, earth, rock, or other material in swift motion down a mountainside or over a precipice );v.雪崩 ( to descend in an avalanche )

例:Over the same period, however, the number of visitors to ski resorts who were caught in avalanches decreased, even though there was no reduction in the annual number of avalanches in the Sordellian Mountains.

6.aversion n．厌恶，反感( antipathy)

联想记忆：a+vers(转)+ion--转开--厌恶

例:Their aversion to government paperwork made them reluctant to pursue many government contracts.

同根词：adverse(a.不利的)

7.avian n.鸟;a.鸟类的(of, relating to, or derived from birds)

词根记忆：avi(鸟)+an--鸟；鸟类的

例:These results confirmed that avian species can develop preferences for palatable food through social leaming.

同根词：aviator(n.飞行员)

8.aviation n.航空（术）（the operation of heavier-than-air aircraft）；飞机制造业(airplane manufacture)

词根记忆：avi(鸟)+ation(表名词)一像乌一样飞一航空

例:Ardatilon fuel is projected to decline in price over the next several years.

同根词：aviary(n．鸟舍，鸟笼)

9.avlator n.飞行家，飞行员(the pilot of an aircraft)

词根记忆：来自aviate(v.飞行)

例:All trainees in a certain aviator training program must take both a written test and a flight test.

同根词：aviation(n.航空)

10.avidly ad.渴望地，热心地(eagerly)

例:The more rare something becomes, the more avidly it is sought by collectors.