unit 3:1. impression n. 印记；印象；感想；后接 of sb./ of sth./ on sb./ that 从句；e.g. my first impression of him was favourable.i got the impression that they were unhappy about the situation. 知识拓展：impress v.给……留下深刻的印象；使铭记；使感动；常用结构有：impress sth. on/upon sb./impress sb. with sth.给……留下深刻的印象；使铭记；e.g  it impressed me that she remembered my name.令我佩服的是她记得我的名字。 2.  remind v.提醒；使想起；常用结构有: remind sb. to do sth.提醒某人做某事；remind sb.＋(that)/wh-从句 提醒某人……；使某人想起……；remind sb. about/of sth. 使某人想起或意识到……；提醒某人某事 e.g. i'm sorry, but i've forgotten your name, can you remind me?you remind me of your father when you say that.知识拓展：reminder n.提醒物；引起回忆的事物 3.  constantly adv.始终；一直；重复不断地e.g. fashion is constantly changing.时尚总是日新月异。知识拓展：constant adj.连续发生的；不断的；重复的； 4.  previous adj.先前的；以往的；（时间上）稍前的e.g. no previous experience is necessary for this job.i couldn't believe it when i heard the news. i had only seen him the previous day.知识拓展：previously adv. 先前的；早先e.g. the building had previously been used as a hotel. 5.  bend v.（bent bent）弯曲；使弯曲；弯腰；弯身；e.g. it's hard to bend an iron bar. 把铁棒弄弯很不容易。she bent her head and kissed her daughter. 她低下头吻了她的女儿。常用搭配有: bend one's mind/efforts to sth. 致力于某事bend sb.to sth. 迫使；说服bend the truth 歪曲事实 6. press v. 压；按；推；挤；坚持；敦促 n. 报章杂志，新闻工作者，新闻界e.g. she pressed a handkerchief to his nose. 她用手绢捂住鼻子。she pressed down hard on the gas pedal. 她用力踩下油门踏板。he is still pressing her claim for compensation. 他仍坚持索赔。the press was/were not allowed to attend the trial. 庭审谢绝新闻采访。 7.  switch n. & v. 用作名词表示“开关；转换”。用作动词表示“转换”。e.g. she made the switch from full-time to part-time work when her first child was born.press these two keys to switch between documents on screen.i can't work next week, will you switch with me? 8.  lack n. & v. 用作名词，表示：“缺乏；短缺”；用作动词，表示：“缺乏；短缺；没有；不足”。e.g. a lack of food /money/skills 缺乏食物/金钱/技能the trip was cancelled through lack of interest. 因为缺乏兴趣这次旅行被取消了。he lacks confidence. 他缺乏信心。知识拓展：lacking adj. 缺乏；没有；匮乏；不足 9.  surroundings n.[pl.] 环境；surround v. 围绕；环绕 surrounding adj. 周围的；附近的 e.g. everyone likes to work in pleasant surroundings.  10. catch/gain/get sight of 发现，看出 ø lose sight of 看不见,忘记ø lose one's sight 失明ø at first sight 一见就；乍看起来 at first sight, the problem seems easy.øat (the) sight of 一看见就…… at the sight of the teacher, the boy ran away.øbe in sight 看得见，在眼前 the island is still in sight.øout of sight 看不见 out of sight, out of mind. 11.  take upto fill or use an amount of space or time 占用（时间）；占据（空间）to learn to or start to do sth 开始做（某项工作）；开始从事to accept sth. that is offered or available 接受（建议或能得到的东西）e.g. the table takes up too much room. 这张桌子太占地儿。they have taken up golf. 他们学起打高尔夫球来了。she took up his offer of a drink. 他请她喝一杯，她接受了。he takes up his duties next week. 他下周就要开始履行职责。 12.  sweep up 打扫；清扫；横扫；涌向；快速地抱起e.g. he swept up the baby up into his arms. 他一把将孩子抱进怀里

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