New words：

unstable ['ʌn'steibl] adj.不稳定的；易变的

Sample Sentences：

The patient's condition was unstable.
This bookcase is too unstable to hold so many books.
The table is unstable because one leg is shorter than the others.

New words：

piss [pis]
vi.<非正式> 撒尿；使厌烦；走开
vt.使生气
n.撒尿

pissed off 生气；愤怒

Sample Sentences：

I need a piss.
The boy has pissed his trousers.
Don't forget to sit down when you piss!
I'm really pissed that you said that to me!

I'm really pissed off at Harry.
I'm pissed off with the way they've treated me.

New words：

forbidden [fə'bidn]
v.forbid的过去分词
adj.被禁止的；禁止的；不准的

Forbidden City 紫禁城

Sample Sentences：

It's forbidden to smoke here.
Smoking is forbidden in this office.
This was a forbidden area for foreigners.
I have got a general idea about the history of the Forbidden City.

New words：

forbid [fə'bid] v. 禁止；不准；不允许；〈正式〉严禁
forbade [fə'bæd] forbid的过去式

Sample Sentences：

I forbid you to tell anyone.
Her father forbade the marriage.
The doctor forbids him smoking and drinking.
My parents forbid me from having wine and cigarettes.
Put yours hands above the head! Forbid to do anything!

New words：

minor ['mainə]
adj.轻微的；较小的；次要的
n.未成年人

Sample Sentences：

You can't serve drinks to minors.
I was lucky to escape with minor injuries.
The law forbids shops to sell alcohol to minors.
The young actor was given a minor part in the new play.
He left most of his money to his sons; his daughter only received a minor share of his wealth.

forbid [fə'bid] v. 禁止；不准；不允许；〈正式〉严禁