unit 3 computers
一．重难点。
1. calculate vt.
1)计算，核算。
the committee calculated the costs very carefully.
2)估计。i calculate what it will cost.
3)[美][口]以为；认为。
i calculate all of them will come here.
4)打算或计划做某事。
this advertisement is calculated to attract the attention of children.
the loss has not yet been __accurately, but it is believed to be well beyond a hundred million dollars.
a. calculated b. consider c. completed d. controlled
2. compare v. &n.
1)比较，对比。
compare a with b 把a与b相比较 compare a to b 把a比作b
2)vi. 与……类似、相似。
compare with/to sb./sth. 比起某人、某物，与某人、某物相比。
this school compares with the best in the country.
3)独一无二的东西，举世无双。
a diamond beyond compare
compare notes with sb.与某人交换看法（或意见等）
1)全世界的，共同的，全体的。
agreement on this issue is almost universal.
2)普遍存在的；广泛适用的。
a universal problem
although i was young i could simplify difficult sums.
although引导让步状语从句。
a simplified text 简易读本。
5. sum n. &v.
1)n. [c]总数，总和。
the sum of two and five is seven.
2)n. [c]金额，钱数。
it will cost an enormous sum to build the stadium.
3)n.(pl.)算术题。
tom is better at sums than i am.
4)vt. &vi. 共计。
sum up the figures
in sum总而言之 sum up总结，概括。
6. before
1)在……以前。
he had left before i arrived.
2)……之后才……
常用结构：it will be + 时间 + before +从句多久之后才……
it will bot be + 时间 + before +从句没过多久就会……
it will be three years before we meet again.
3)（不久）就；还没来得及……就……
常见结构：it was(wasn’t) +时间 + before + 从句。
it wasn’t long before he returned from abroad.
7. artificial
1)人工的；人造的；假的。
an artificial flower/limb
2)人为的；非自然的。
an interview is a very artificial situation.
3)虚假的；假装的。
artificial emotion
8. intelligence智力，材质；消息，情报。
use your intelligence.
secret intelligence
9. solve 解答；解决。
辨析：辨析：
10. from…on
from then/that time on从那时起 from now on从现在起
from… to…from morning to night
11. reality
辨析：12. share
share sth. with sb.
share sth. among/between sb.
share and share alike
13. application
apply 申请；应用。
14. communication
1)[u]交流，通讯。
2)[c]交通或通讯设备。
15. finance n. &v.(finacial)
1)n. 资金。
finance for education
2)n.[u]财政；金融；财务。
the minister of finance财政部长 the finance director/department财务主任、财务科。
3)(finances)(pl.)（个人、组织、国家的）财力，财源，财务管理。
buying the new house put a severe strain on our finances.
4)v. 给……提供资金。
he took a job to finance his stay in australia.
adj. &n.
1)adj. 非固定的，可移动的。
mobile equipment a mobile shop a mobile hospital mobile home
2)adj. 行动方便的，腿脚灵便的。
3)adj.易于变换社会阶层（或工作、住处）的，流动的。
a mobile workforce
4)adj. 多变的，易变的。
she has a mobile face.
5)n. 风铃，（可随风摆动的）悬挂饰物。
17. explore vt.
1)探测，勘察，探险。
the oceans h**e not yet been fully explored.
2)**，仔细查阅。
i’ll explore the possibility of getting a job here.
18. goal n.
1)目标；目的。
goals determine what you are going to be.
2)进球；得分。
get/make a goal
3)球门。keep goal 守球门。
achieve one’s goal kick a goal
they provided food and clothing for the homeless.
provide sb. with sth. =provide sth. to/for sb.
the sun provides us with light and heat.
provide against provide for sb.
辨析：upload上传search engine搜索引擎 log on/in登录，上线
log off/out注销，下线 chat room聊天室 click点击。
21. in reality
in fact in actual fact as a matter of fact
22. give away
1)捐赠，赠送，分送。
he g**e away most of his money to the charity.
2)分发，颁发。
the headmaster g**e away the prizes at the school sports day.
3)泄漏，暴露。
give away the secrets
4)丧失，失去。
he g**e away his fortunate.
23. consist
consist of 由……组成 consist in 在于 consist with 与……一致。
our team consists of 11 members.
happiness consists in health.
由……组成用被动语态：be made up of be composed of
用主动语态：consist of
24. advantage
1)优势，有点。
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