New Words：

notice [ˈnəʊtɪs]
n.注意；通知；通告；公告牌；警示牌
v.注意；留意；意识到；注意到

Sample Sentences：

I noticed them come in.
The first thing I noticed about the room was the smell.
Tony didn't notice because he was too engrossed in his work

The notice said 'Keep Out'.
There are just two notices this week.
The notice is placed too high nobody can read it.

engrossed [ɪnˈɡroʊst] adj. 全神贯注的;聚精会神的;专心致志的

New Words：

escalate [ˈeskəleɪt] v. 逐步升级;不断恶化，加剧

Sample Sentences：

The cost of living is escalating.
We do not want to escalate the war.

New Words：

lift [lɪft] n.电梯；升降机
elevator [ˈelɪveɪtər] n.电梯；升降机

Sample Sentences：

It's on the sixth floor─let's take the lift .
He pushes all the elevator buttons.
There is no elevator in our building.
The elevator doesn't stop at floors 1, 2 and 3.

New Words：

escalator [ˈeskəleɪtər] n. 自动扶梯，手扶电梯

Sample Sentences：

Turn left when you get off the escalator.
Take the escalator to the third floor then turn right.
When taking the escalator, which side should you stand on?

New Words：

nest [nest] n.窝；鸟巢；巢穴；鸟窝

Sample Sentences：

I can see an eagle's nest on the rocks.
The birds are busy building their nests.