必修一WelcomeUnit1.exchange:anexchangestudent交换生exchangeideasexchangeprograms交流项目exchangesthwithsb.与某人交换某物inexchangefor：以...作为交换；用...来交换。2.lecture讲座=speech演讲lecturer讲师；演讲者give/deliveralecture做演讲（讲座）3.registerv.注册；报到；登记registrationn.4.sex性；性别n.sexyadj.性感的5.male男性；雄性(反义词)female6.nationn.国家national国家的adj.nationallyadv.全国性地internationaladj.国际的nationalityn.国籍minority少数民族7.design设计designern.设计师bydesign故意bedesignedbysb.被某人设计bedesignedtodosth被设计用来做某事；专门为做某事而设计8.oncampus=atschool=inschool在校园9.formaladj.正式的informaladj.非正式的formallyadv.正式地informally非正式地formalityn.正式手续；形式上的措施；formalizevt.使(协议、计划等)成书面文字形式；使正式化；使具有一定形式formn.表格；格式v.形成10.anxiousadj.焦虑的；渴望的anxiouslyadv.焦虑地anxietyn.焦虑；忧虑；不安beanxiousabout=beworriedabout=beconcernedabout担心；担忧beanxioustodosth=bekeento渴望去做dobekeenonsth喜爱某事11.annoyv.使疲倦，使烦恼，使生气annoyingadj.讨厌的；恼人的annoyedadj.恼怒的；烦闷的annoyancen.烦恼；生气,令人烦恼的事;令人不快的事.beannoyedwithsb.=beangrywithsb.对某人感到恼火或烦恼beannoyedatsth.对某事或某行为感到恼火或烦恼12.fright惊恐，惊吓n.frightenv.（使）惊恐；吓唬frightenedadj.害怕的frighteningadj.吓人的，可怕的frightenaway吓走frightened=veryafraid=terrified=veryscared13.beseniorto比…年长bejuniorto比…年轻；年幼；职位低seniorcitizens=theelderly=elderlypeople=oldpeople14.atlast=lastly=finally=intheend=eventually=lastbutnot最后least15.outgoing外向的easygoing容易相处的16.impressv.给…留下印象impressionn.印象impressedadj.对...印象深的impressiveadj.让人印象深刻的make/leaveanimpressiononsb给某人留下深刻的印象beimpressedby/with被…留下深刻印象；对…印象深刻agoodimpression一个良好的印象17.whatif=whatwillhappenif…(主将从现)要是…将会怎么样？18.guy(pl.)guys家伙；大家19.concentrateon(doing)sth集中精神做某事；concentrationn.专心,专注，浓度,concentratedadj.concentrateon=focuson=beabsorbedin=beengrossedin全神贯注做某事120.experimentn.实验；试验experimentaladj.实验性的；试验性的21.leavesb/sthalone不要打扰某人/某物22.awkwardadj.令人尴尬的；棘手的；难对付的embarrassedadj.尴尬的（修饰人）embarrassingadj.令人尴尬的（修饰事物）23.explore探测，探索v.exploration探索，考察n.explorern.探测者，探测家24.confidentadj.自信的confidencen.自信心confidentlyadv.自信地beconfidentabout=haveconfidence对…有信心in25.lookforwardto(doing)sth期待；盼望expecttodosth期待；预料beexpec