displace [ dIs5pleis ] v.  取代;替代
— Moderates have displaced the extremists on the committee.
     在委员会中,稳健派人士取代了激进派人士。
— The automobile has practically displaced the horse and buggy.
     汽车实际上已代替了马和马车。
这些词汇应该记住：   
1. to cover for sb. [5kQv[ fC:]   代替某人工作
— I'll cover for Jane while she's on holiday.    简休假时我替补(代替)她工作。
2. to fill in for sb. [5fIl In]   (由于某人不能工作而)临时替代
—Sally's off sick.. Can you fill in for her for a few days?
     萨莉生病请假了。你能临时替她几天吗?
3. (to be) in place of  sth. [5pleis]   代替          
— The chairman was ill so his depute wi his place.
     主席有病,所以由副主席代(替)为致辞。
— I will go in place of my teacher.    我将代替老师去。
* to take the place of ... ;  [5teik 5pleis]   代替;取代
—It would be difficult to find a man to take the place of the secretary.
     找一个代替秘书的人会很难的。
— She couldn't attend the meeting so her assistant took her place.
     她不能主席会议,所以由助手替她。
4. instead [In5sted]   adv.  代替
—If there is no coal, oil can be used instead.    如果没有煤, 可以用石油来代替。
* instead of  sth.    代替
— I'll go instead of my brother.    我代替我兄弟去。
—Will you go to the party instead of me?    你替我赴宴好吗?
5. in lieu of sth. [ ljU: ]  代替                                 
—We used saccharine tablets in lieu of sugar.      我们用糖精片代替糖。
—This hotel accepts a cheque in lieu of cash.    这家宾馆接受支票替代现金。
6. to pinch-hit for [5pIntFhIt]   (美;紧急时)代替某人做某事
— The actor was ill suddenly, he had to pinch-hit for.
     那位演员突然病了,他不得不代替她。
—I am supposed to help entertain the guests at the reception this afternoon, but I can't go.Will
     you pinch hit for me?
     今天下午的招待会要我帮忙招待客人,但是我不能去,请你代替我行吗？
7. replace [ rI5pleis ] v.  取代;代替
— Robots are replacing people on assembly lines.    机器逐渐代替了装机线上的工人。
* replace  n.  取代;代替
— The replacement of man by machines has not to unemployment.
     机器取代人工,并未导致失业。
* replaceable [rI5pleis[bl]  adj.  可代替的
—A person, unlike a machine, is not replaceable.    人和机器不同,是不可替代的。
* replacement [rI5pleism[nt]   n.  代替;替换
—As Jack is ill, we have to get a replacement for him.
    杰克生病了, 我们必须找一个人代替他。
8. to stand in for sb. [5stAnd In]    暂时代替(某人)的工作
—Can you stand in for Mr Zhang while he's on vocation?
     张先生休假期间,你能暂时代替他工作吗?
9. sub [ 5sQb ] v.   (过去式和过去分词subbed;现在分词subbing ;尤指人的)代替
— I had to sub for the referee who was sick.    裁判病了,我得代替他。
10. substitute [ 5sQbstItju:t ] v.  (尤指用新的或不同事物来)代替;替换;顶替
—We could substitute honey for granulated sugar.     我们可以用蜂蜜代替砂糖。
* to substitute for sb.  替代;替换某人
—Can you substitute for the singer who is ill?     你能替代那位生了病的歌手吗？
* substitution [ 9sQbstI5tju:F[n ] n.  代替;替换
— Honey can substitute for sugar in this recipe.    在这个食谱中,可用蜂蜜代替食糖。
11. supersede [ 9sjup[:5sI:d ] v.  (指物与物的替换,尤指被替换之物已经过时或无用)替代
— The new pen will supersede all others.    新钢笔将代替所有其他钢笔。
— Motorways have largely superseded ordinary road for long-distance travel!
     高速公路已取代了普通公路。
12. supplant [ s[5plB:nt ] v.  (指以不正当的方式取而代之)取代;代替
— The party leader has been supplanted by his rival.   
     那位党的领导人已被其对手取而代之了。
这些词汇应该知道, 掌握更好：
1. fill-in [5fIl In]  n.  临时替代的人;替工
— I'm only here as a fill-in while Robert's away.   
     我只是在罗伯特不在时来这里临时顶替一会儿。
2. to give way to sth. [5gIv 5wei tU]   被... 代替
— The storm give way to bright sunshine.    暴风雨过后出现了灿烂的阳光。
3. relieve [ rI5lI:v ] v.  (尤指值班,站岗等的)替换
— The watchman of the storehouse will be relieved at 10 p.m.
     库房的看守人将于晚上十点换班。
4. spell [ 5spel ] v.  (美;口)暂时代替某人工作
— Can I spell you at the wheel?    我可以暂时替你开车吗?
— They spelled each other at watching in on the suspect.   他们替换着监视那名嫌疑犯。
5. (to be) in one's stead [5sted]  代替某人
— She couldn't come,but sent her sister in her stead.    她不能来,而叫他妹妹替代她。
6. succeed [ 5[k5sI:d ] v.  替代;替换
— This is a new generation of computers designed to succeed their existing range.
     这是为替代现有电脑系列而设计的新一代电脑。