New words：

involved [in'vɔlvd] adj.涉及的；牵连的；有关的；卷入
be involved in 卷入；涉及；专心

Sample Sentences：

I got involved in a quarrel about the price.
I was so involved in my book I didn't hear you knock.
The evidence shows that Paul is involved in that murder.
Some people tried to stop the fight but I didn't want to get involved.

New words：

involve [in'vɔlv] v.需要；包含；牵涉；影响；加入

Sample Sentences：

Many of the crimes involved drugs.
I'm still not clear what the job involves.
How many vehicles were involved in the crash?
Parents should involve themselves in their child's education.

vehicle [ˈviːəkl] n. 车辆；交通工具

New words：

gradual ['grædjuəl] adj. 逐渐的；逐步的；渐进的；平缓的
gradually ['grædjuəli] adv. 渐渐地；逐步地；逐渐地

Sample Sentences：

I make a gradual plan for him to jog.
Recovery from the disease is very gradual.

We began to know each other gradually.
We watched their ship moving gradually farther away.

New words：

degrade [di'greid] v.降级；降低…身份；侮辱…的人格；降解

Sample Sentences：

No one can degrade us except ourselves.
Don't degrade yourself by answering him.
He think that telling a lie degrade himself.

New words：

society [sə'saiəti] n.社会；学会；协会；社团

Sample Sentences：

I joined the reading society in our school last year.
A good education is very important for one's success in society.
The role of women in society has changed a lot in the past few decades.