5. concern [ k[n`s[:n ]

(1) vt. 涉及；与……有关
The environmental problem concerns everyone in the world.
This episode concerns two people and one chair.

(2) vt. 使担心；使挂念
The poor business concerns the proprietor.
买卖不好让业主担心。
The old man's health concerns his son.

(3) (n.) 有关的事；感兴趣的事
The approaching World Cup is everyone's concern.
It is very much my concern whether you can pass the examination.

(4) 关心；牵挂；忧虑
"Have you got the meaning?" the teacher asked in concern.
Health care is the government's concern.
保健是政府关心的事。

6. reaction [ ri`AkF[n ] n.

(1) effect (与 on, upon连用）有效果；起作用
I didn't expect such a violent reaction from him.
我没想到他的反应如此强烈。
It is usually said that there is a healthy reaction after a cold bath.
人们常说洗个冷水澡会让人精神焕发。

(2) (尤指政治方面的) 反动
The forces of reaction made reform difficult.

(3) 反应；回答
His reaction to the criticism is silence.
What is the advertiser's reaction to this proposal?
广告商对此建议的反应是什么。

(4) 化学反应
The chemical reaction is very complicated.
这个化学反应很复杂。

7. decide [ di`said ]

(1) give a judgment 判断
After the comparison, I decided that the red jacket is more suitable for me.
比较后，我觉得红夹克更适合我。
We judged the question by experience.
我们借助经验判断此事。

(2) make up one's mind 决定
It has been decided that the competition is cancelled.
The actress decided not to feature in this film.
那位女演员决定不主演那部电影。
decide on 决定选择
After consideration, I decide on this plan.

8. concoct [ k[n`kRkt ] vt.

(1) invent 编造
I am afraid you must concoct a reasonable excuse for your being late.
The writer is busy concocting the plot of the story.

(2) prepare by mixing together 混合
The waiter is very skillful with concocting wine.
那位服务生很会调酒。
My mother is learning to concoct a new kind of soup.