New Words：

center ['sentə] n. 中心；中央；核心；圆心

Sample Sentences：

We decided to skirt round the town center.
The park is located in the center of the city.
The flag was red, with a large white circle in the center.

skirt [skɜrt] v. 绕开；位于…的边缘；环绕…的四周；沿…的边缘走
locate [ləu'keit] v. 定位；位于； 把 ... 设置在；使坐落于
location [ləu'keiʃən] n.位置；定位；地点

New Words：

universe ['ju:nivə:s] n. 宇宙；万物；世界

Sample Sentences：

The spaceship traveled smoothly in the universe.
May our friendship last till the end of the universe!
At that time people believed the earth was the center of the universe.
Why should I listen to you? Do you really think you are the center of the universe?

center ['sentə] n. 中心；中央；核心；圆心

New Words：

galaxy ['gæləksi] n. 星系；银河；银河系

Sample Sentences：

The earth is one of the planets in the Galaxy.
How can a spaceship travel across the Galaxy in no time at all?
We still don't know how many galaxies there are in the universe.

universe ['ju:nivə:s] n. 宇宙

New Words：

claim [kleɪm] v.声称；宣称；主张；要求

Sample Sentences：

They claim that they have nothing to hide.
He claims he was not given a fair hearing.
She claimed that the ring was stolen, not lost.
Does it claim that you'll lose a lot of weight in a very short time?

New Words：

exist [ig'zist] v. 存在；生存

Sample Sentences：

Man cannot exist without air.
He walked past me as if I didn't exist.
The problem only exists in your head, Jane.
Few of these monkeys still exist in the wild.