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1.The isospin symmetry of the nucleus is a fundamental principle in nuclear physics.
原子核的同位旋对称性是核物理学中的一个基本原理。
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2.The discovery of new isotopes has led to many important scientific breakthroughs.
新同位素的发现导致了许多重要的科学突破。
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3. In this experiment, we studied the effect of isotopes on the reaction rate.
在这个实验中,我们研究了同位素对反应速率的影响。