核武器改变了现代历史的进程。

Nuclear weapons have changed the ___course of modern history.

没有任何单一事件能决定人类发展的长期进程。

No single event can determine the long-term ___course of human development.

伟大的文明兴起又衰落，每一个都改变了历史的进程。

Great civilizations have appeared and disappeared, each altering the ___course of history.