This is the 968th most frequent Chinese word.
首都
Capital city.
In this sentence, '首都' is used to denote a political and administrative center, meaning 'capital city.'
北京是中国的首都。
Beijing is the capital of China.
Here, '首都' is referred to as a general concept of the primary city of governance for any country.
每个国家通常只有一个首都。
Every country usually has only one capital.
The use of '首都' in this sentence indicates Paris as the administrative capital of France, emphasizing its importance.