1. difference n 差异，差别 vi. differ
Young people must be taught to tell the difference between good and evil.
必须教导年轻人学会区分善与恶。
There are many differences in culture and language between America and Britain.
拓展：
It makes no difference to me whether he goes or not.
不管它去还是不去，对我都没有影响。
In this aspect, French differs from English. 在这方面，法语不同于英语。

2．request n. vt. 要求，请求
An application form will be sent to you on request.
如果你需要的话，会寄给你一张申请表。
Don’t blame him---He did it at his boss’s request.
别责怪他，他是按老板的要求做的。
The boss refused our requests to have a pay raise.
老板拒绝了我们加工资的请求。
Visitors are requested not to walk on the grass.
游客请勿践踏草地。
We requested that the next meeting be held in the afternoon.
我们要求下一次会议在下午举行。

3．remark vi.说；谈论，评述 n.评论，意见；注意
Dr Johnson once remarked“When a man is tired of London, he is tired of life. ”
约翰逊博士曾经说过：“当一个人厌倦了伦敦时，他就厌倦了生活。”
All his friends remarked on the change in him since his marriage.
他所有的朋友都在议论他婚后的变化。
This is a place worthy of remark.
这是一个值得注意的地方。
He refused to remark on the film.
他拒绝评论该部电影。

4．tour n.旅游，观光；巡回演出；任期 vt. vi. 旅游，观光；巡回演出
We went on a guided tour around the factory.
我们在向导带领下参观了这家工厂。
The England cricket team is currently on tour in Pakistan.
英国板球队目前正在巴基斯坦作巡回比赛。
The French ambassador left Moscow at the end of his tour of duty last week.
法国大使上星期在他任期满后离开了莫斯科。
The President toured US military bases last Monday.
总统上周一巡视了美军基地。   

5．accumulate vt. 收集，积累 vi. 增加，增长
As people accumulate more wealth, they tend to spend a greater proportion of their incomes.
当人们积累了更多财富时，往往会将更多的收入用于消费。
We have accumulated so much rubbish over the years.
这些年来我们已积起了这么多垃圾。
A thick layer of dust had accumulated in the room.
房间内已经堆积起了厚厚的一层灰。
If you don’t sort out the papers on your desk, they will keep on accumulating.
如果你不定期整理桌上的文件的话，它们就会越积越多。

6．plain n. 平原 adj. 简单的，朴素的；普通的
I prefer plain architecture.
我喜欢朴素的建筑。
My mother likes good plain food.
我妈妈喜欢清淡好吃的食物。
There were policemen in plain clothes in the crowd.
人群中有穿着便衣的警察。
Such crops can be found in the plains.
这种庄稼可见于平原。

7．power n. 权力；能力；力量
I’ve no power over her---she takes no notice of anything I say.
我管不了她―她根本不理我说的话。
When one politician falls from power, another comes to power in their place.
一个政客下台，另一个就会上台取而代之。
The surgeon did everything in his power to save him.
医生施展了所有本领来拯救他。
The explosive power of the bomb was the greatest ever used in terrorist attack.
在恐怖分子袭击所用的炸弹中这颗的爆炸力最强。