New Words：

still [stɪl]
adj.静止的, 不动的,静寂的
adv.仍然；还；还是；依旧
v.(使)静止;（使）平静，安静

Sample Sentences：

The wind stilled.
The food stilled the baby's cries.
Keep still while I brush your hair.
The room was still at the end of the speech.
Although she felt ill, she still went to work.

New Words：

surface [ˈsɜːrfɪs] n. 表面；地面；表层；水面

Sample Sentences：

The surface of the lake is quite still.
She's cleaned all the kitchen surfaces.
These plants float on the surface of the water.

still [stɪl] adj. 静止的；平静的；安静的；寂静的

New Words：

worn [wɔːrn]
adj.用坏的；用旧的；磨薄的；疲惫的
v.“wear”的过去分词

worn out adj. 破烂不堪的；废旧的；疲惫不堪；精疲力竭

Sample Sentences：

His face looked worn and old.
He is wearing an old pair of worn jeans.

She was worn out after a day's walk.
Your shoes are worn out, go and buy a new pair.

New Words：

mark [mɑːrk]
n.记号, 痕迹, 分数, 污渍, 斑点
v.弄污,打分, 留意, 做标记, 留下痕迹

Sample Sentences：

Prices are marked on the goods.
I marked that down in my notebook.
The box of eggs was marked "With Care".
The teacher marked the examination papers.

I got full marks in the spelling test.
The wet glass left a mark on the surface of the table.
The children left dirty marks all over the kitchen floor.
You'd better make a mark where you have any questions.

surface [ˈsɜːrfɪs] n. 表面；地面；表层；水面

New Words：

technology [tek'nɔlədʒi] n. 技术；科技；工艺

Sample Sentences：

We are proud of our new technology.
How can Hong Kong stay ahead of technology?
This country leads the way in space technology.