名词
中文翻译：Unknown
同义词：
['primary fragment', 'primary fragmentation', 'primary fission product']
例句：
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1. The primary fission fragments are the smallest pieces of the nucleus that can be observed directly.
初级裂变碎片是可以直接观察到的核子最小的部分。
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2. During the primary fission process, the neutrons and protons are split apart, creating a large number of secondary fission fragments.
在初级裂变过程中，中子和质子被分开，产生大量的次级裂变碎片。
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3. The study of primary fission fragments is crucial for understanding the properties of nuclear matter.
研究初级裂变碎片对于理解核物质的性质至关重要。