We are acquaintances and talk frequently.我们是熟人，经常在一起聊天。

acquisition n.得到，获得

The stockbroker made an acquisition of the future price of the stock based on its historical growth patterns.股票经纪人根据股票的历史增长趋势， 获得股票的未来价格。

adapt v.(使)适应，调整；改编

After moving to Harbin, Janet adapted the cold weather.珍妮特在搬到哈尔滨之后，适应了寒冷的天气。

aduquate adj.足够的，充足的

I bought four bottles of water for our camping trip and I hope it is adequate. 我为露营买了四瓶水，希望这些已经足够了。

administration n.管理，经营；行政机关；执行

Headmasters are more involved in administration than in actual teaching.校长大部分的工作是行政管理，而不是实际教学。

The school administration met to decide on a new school policy.学校管理委员会召开会议，来确定学校的一项新政策。

adopt vt.采用，采纳；收养

The company adopt new policies regarding maternity leave.公司采取了新的产假政策。

The Browns adopted the baby when she was just three months old.在这个婴儿三个月大时就收养了她。

affection n.友爱；挚爱；情爱

Janet felt great affection for her parents only. 珍妮特只跟她的父母有很深的感情。

afford vt.付得起；冒险做；提供

I was going to buy a diamond necklace as a birthday gift for Sally but couldn’t afford it so I bought her an artificial one.我本来想买一条钻石项链， 作为送给萨莉的生日礼物，但我买不起，所以我给她买了一条假的。

agent n.代理（商）

David worked as a travel agent.大卫曾经是一名旅行社代理人。

aggressive adj.有进取心的；好斗的，有敌意的

His victory was largely a result of his aggressive election campaign.胜利很大程度上源自他积极的竞选活动。

The country made an aggressive attack on a neighboring nation. 这个国家主动攻击了邻国。