shì
jì
1
century
他们在演奏二十世纪的古典音乐。
They are playing classical music of the 20th century.
一个世纪代表一百年。
One century represents 100 years.
我最近在研究二十世纪我国的历史。
Recently I've been researching the history of my country in the 20th century.