This is the 2782nd most frequent Chinese word.
大革命
"大革命" means "Great Revolution."
Here, '大革命' is used to specifically name the 'Cultural Revolution', a significant historical event in China.
文化大革命是中国历史上的重要时期。
The Cultural Revolution was an important period in Chinese history.
In this sentence, '大革命' is used generally to describe significant revolutionary events.
许多大革命对社会造成了深远的影响。
Many great revolutions have had a profound impact on society.
Here, '大革命' refers specifically to the French Revolution, indicating its historical importance.