n.main body; chief
The center of our country's work is economic construction.
Beijing is the capital of our great socialist motherland and its political and cultural center.
The point of the article is not clear.
n.centre (city or area of certain importance)
Where is the political centre of China?
Where is the hub of industry?
Here is the traffic hub.
n.centrum; centrality; kernel; hear
Although Beijing is China's capital, it is not at the geographical centre of the country.
There is a small boat in the middle of the lake.
I live at the centre of the city.
n.(often used in the name of a business or organization) institution or organization with a complete set of facilities, technology, etc.
- "中心" is often matched with measure word "个".