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1. Galilei was a famous scientist who made many important discoveries in physics and mathematics.
伽利略是一位著名的科学家，他在物理学和数学领域做出了许多重要的发现。
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2. Galilei's work on the telescope revolutionized our understanding of the universe.
伽利略对望远镜的研究彻底改变了我们对宇宙的理解。
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3. In his book, Galilei discussed the importance of observation and experimentation in science.
在他的书中，伽利略讨论了观察和实验在科学中的重要性。