正电子和电子(粒子和反粒子)在对撞中会发生湮灭，并产生电磁辐射。
Positron and electron (particle and anti-particle) can annihilate in collision turning into electromagnetic radiation.
依照理论，物质只能在粒子-反粒子对中产生。
According to the theory, matter can only be created in particle-antiparticle pairs.
当粒子和它的反粒子相遇时，它们会发生湮灭并产生能量。
When a particle and its antiparticle meet they can mutually annihilate and produce energy.
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