Welcome to the unit
1. in a sense从某种意义上来说
2. stand for代表 
3. inform sb. of / about sth.告诉某人某事 
4. in circle 以圆圈
Reading
1. throughout / all over / across the country
2. be made up of = consist of
3. develop from 从……中发展起来   develop from …into…发展成为
4. mix A with B  mix up
5. give name to sth./sb.给…取名/为…定一个名
6. pick up  pick out  
7. contribute to 有助于，促使（发生情况）
  contribute…to…对…作出贡献= make contributions to
8. take control of
9. replace …with…   replace…as
10. have an impact on  影响;作用  ( influence / effect)
11. result in  结果;导致(=lead to)  result from (because of, due to)
   as a result (of)
12. at this point
Word Power
1. more…than…
2. play sports进行体育活动
3. a large amount of (接不可数名词)
    a large number of = large numbers of（接可数名词）
4. sort out安排
5. throw away扔掉
6. have a word with 与…讲话；和…谈话
7. take sth. into consideration考虑到 = think about ; consider
8. members of the United Nations联合国成员国
9. permanent members of the UN Security Council联合国安理会常务理事国
Grammar and Usage
1. function as = play a part; act as起…的作用
2. in any cases在任何情况下；无论如何
3. dream of梦见; 梦想; 设想, 考虑
4. come true实现，成为现实
5. a waste of time / money / energy浪费时间/金钱/精力
6. disagree about 不同意
7. be set for 为……确定…
8. set standard for 为……确定标准
9. across the world = all over / throughout
10. at one time曾经；一度时期 at the time当时,在那个时候 at any time 随时，
   at no time决不，任何时候都不 at times有时
11. be due to归功于;由于 = because of ; owing to