1.atmosphere n.大气(the whole mass of air surrounding the earth)；气氛(a surrounding influence or environment)

词根记忆：atmo(大气)+sphere(球体)--围绕地球的空气--大气

例:Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life.

派生词:atmospheric(a.大气的，大气层的)

2.attain v.达到，完成(to achieve)；获得(to gain)

词根记忆：at+tain（拿住）--稳稳拿住--获得

例:Many European breeds of cattle attain average milk production levels exceeding 2,700 liters.

派生词:attainment(n.成就;到达)

3.attempt n.企图，尝试(the act or an instance of attempting);v.试图，尝试(to make an effort to do, accomplish, solve)

词根记忆：at（加强）+tempt(尝试)--尝试，试图

例:Firms will begin to cross national borders in an attempt to gain a competitive advantage.

同根词：temptation(n.引诱；诱惑物)

4.attendance n.出席，到场（the act or faiof anendi ng）；出席人数(the persons or number of persons attending)

词根记忆：来自attend(v.出席;照科)

例:Total attendance at Moviemania's movie theaters was more than 20 percent higher last year than the year before.

同根词：attendant(n.服务员;a.伴随的)

5.attendee n.出席者，在场者(a person who is present on a given occasion or at a given place)

词根记忆：来自attend(v.参加，出席)

例:attendee party与会者晚会

同根词：attendant(n.服务员：a.伴随的)

6.attorney n.律师（lawyer）

词根记忆：at+torn（转）+ey--扭转乾坤的人--律师

例:white-collar professionals such as attorneys

同根词：tornado(n.龙卷风)

7.attraction n．吸引，吸引力(the act, process, or power of attracting)

词根记忆：来自attract(v.吸引)

例:It is the recognizable increase in sales that is their main attraction to management.

同根词：distraction(n.注意力分散)

8.attributable a．可归于的(capable of being attributed)

词根记忆：来自attribute(n．属性，特质;v.归属)

例:Such improvements would be attriibutable primarily to companies' facing global competitive pressure.

同根词：distribute(v.分配;散布)

9.attribute n.属性，品质（quality）;v.把…归于(to ascribe)

词根记忆：at+tribute(给，献)--给予，献给--归于

例:In part, this stress can be attributed to the overlords' failure to adjust to a rapidly expanding economy.

派生词:attributable(a.可归于…的)

10.attrition n.磨损(the act of wearing or grinding down by friction);人员耗损(a reduction in numbers usually as aresutt of resignation, retirement, or death)

词根记忆：at+trit(磨擦)+ion--磨损

例:The labor agreement permits staff reductions through attrition.

同根词：contrition(n.悔恨)