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1.The research team discovered that the external neutrons in the sample were responsible for the unusual properties of the material.
研究小组发现，样品中的外部中子是材料异常属性的原因。
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2. In physics, an external neutron is a particle that interacts with other particles through electromagnetic forces.
在物理学中，外部中子是一种通过电磁力与其他粒子相互作用的粒子。
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3. The study focused on the role of external neutrons in nuclear reactions and their impact on the stability of the nucleus.
该研究专注于外部中子在核反应中的作用及其对核稳定性的影响。