大约400年前，伽利略·伽利雷证明了这一原理。
This principle was famously demonstrated by Galileo Galilei some 400 years ago.
文艺复兴时期，尼古拉·哥白尼，约翰尼斯·开普勒和伽利略·伽利雷等人的伟大思想展现了科学研究和发现的力量。
During the Renaissance, the great minds of Nicolaus Copernicus, Johannes Kepler and Galileo Galilei demonstrated the power of scientific study and discovery.
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